build: Rework patch mechanism for Fuel submodules

While refactoring the patching mechanism, take care of:
- Sync submodule handling with Fuel@OPFNV;
- build: Investigate/prepare for moving patches to Fuel@OPNFV;
- build: Investigate divergent fuel-mirror;
- ISO build: cacheid for Fuel comps should not depend on
  Armband git commit;

CHANGE:
 Rename/shuffle patches while grouping them in "features",
 preparing for upstreaming them to Fuel@OPNFV and beyond.

CHANGE:
 Allow linking patches for better representing the dependency
 between one patch and different features.
 e.g. 0001-Add-arch-to-nailgun-release-and-target-image.patch:
   - part of `multiarch-fuel`, because it extends Fuel;
   - part of `direct-kernel-boot`, as arch is required for that;
   - part of `cross-bootstrap`, target image is arch-dependent;
 NOTE: Patch links are not staged to Fuel@OPNFV, they only serve
 as markers that a specific patch is part of a feature.

CHANGE:
 Kill all Fuel component submodules, now handled in Fuel@OPNFV:
  - fuel-agent
  - fuel-astute
  - fuel-library
  - fuel-mirror
  - fuel-nailgun-agent
  - fuel-web

CHANGE:
 Move armband-fuel-config.mk to armband git root.

FIXME: m1.micro-Increase-profile-RAM-size-to-128MB.patch is NOT
 part of `cross-bootstrap` feature, but patch context says so ...

FIXME: 0001-Add-arm64-deb-repositories-setup.patch is broken at
 `make patches-export` by removing spaces at EOL.

v2 -> v3:
 * Phony patch support (links to show a patch belongs to a feature);
 * Updated README.md
v3 -> v7:
 * Re-export Fuel submodules & plugins patches (update patch context);
 * Update Cavium mail addresses (s/caviumnetworks.com/cavium.com/);
 * Ignore submodule changes;
 * Add armband git repo info to gitinfo_fuel.txt at build time;

Implements: ARMBAND-136
Closes-bug: ARMBAND-95
Closes-bug: ARMBAND-93
Closes-bug: ARMBAND-92

Change-Id: I1a236d9f43b2e6dca22055911f696b43c22b5973
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/patches/opnfv-fuel/0000-build-Use-OPNFV_GIT_SHA-for-ISO-preparer-ID.patch b/patches/opnfv-fuel/0000-build-Use-OPNFV_GIT_SHA-for-ISO-preparer-ID.patch
new file mode 100644
index 00000000..27b00c71
--- /dev/null
+++ b/patches/opnfv-fuel/0000-build-Use-OPNFV_GIT_SHA-for-ISO-preparer-ID.patch
@@ -0,0 +1,76 @@
+From: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+Date: Wed, 17 Aug 2016 21:56:22 +0200
+Subject: [PATCH] build: Use OPNFV_GIT_SHA for ISO preparer ID
+
+isoinfo -i lists the following information for Fuel@OPNFV ISO:
+"Data preparer id: 86aafaf5454a846c417848bb94f264c4420160f3"
+where the SHA hash is Fuel git repo HEAD SHA.
+
+For Armband's build system, using only the Fuel commit ID is not
+enough to fully describe the state of the source code, as patches
+are also applied to other fuel modules (as git submodules).
+Instead, a pointer to a valid Armband commit ID should be used.
+
+However, Armband overrides OPNFV_GIT_SHA to the Armband git repo
+commit hash, so the ISO metadata should also reflect this.
+
+While at it, allow product name to be overriden, to signal the
+commit ID should be looked up inside the Armband repository.
+
+Change-Id: I33ad490f1afe28c1d439dda40e39cee1955e0ac2
+Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+---
+ build/Makefile           | 4 ++--
+ build/docker/runcontext  | 2 +-
+ build/install/install.sh | 6 +++++-
+ 3 files changed, 8 insertions(+), 4 deletions(-)
+
+diff --git a/build/Makefile b/build/Makefile
+index 56acb40..ac85498 100644
+--- a/build/Makefile
++++ b/build/Makefile
+@@ -21,11 +21,11 @@ SHELL = /bin/bash
+ export MOSVERSION = 9.0
+ export ISOSRC = file:$(shell pwd)/fuel-$(MOSVERSION).iso
+ export ISOCACHE = $(shell pwd)/$(shell basename $(ISOSRC))
+-export PRODNO = "OPNFV_FUEL"
++export PRODNO ?= "OPNFV_FUEL"
+ export REVSTATE = "P0000"
+ export USER ?= $(shell whoami)
+ export BUILD_DATE = $(shell date --utc +%Y-%m-%d:%H:%M)
+-export OPNFV_GIT_SHA = $(shell git rev-parse HEAD)
++export OPNFV_GIT_SHA ?= $(shell git rev-parse HEAD)
+ # Store in /etc/fuel_build_id on fuel master
+ export BUILD_ID := $(PRODNO)_$(BUILD_DATE)_$(OPNFV_GIT_SHA)
+
+diff --git a/build/docker/runcontext b/build/docker/runcontext
+index daad663..2d13562 100755
+--- a/build/docker/runcontext
++++ b/build/docker/runcontext
+@@ -115,7 +115,7 @@ RUN_CONTEXT_OPT="--cidfile $CID_FILE --privileged=true --rm \
+     -e HOME=$HOME -e CACHEDEBUG -e CACHETRANSPORT -e CACHEMAXAGE -e CACHEBASE \
+     -e BUILD_FUEL_PLUGINS -e MIRROR_UBUNTU -e MIRROR_UBUNTU_ROOT \
+     -e MIRROR_MOS_UBUNTU -e MIRROR_MOS_UBUNTU_ROOT -e MIRROR_FUEL \
+-    -e LATEST_TARGET_UBUNTU -e UBUNTU_ARCH \
++    -e LATEST_TARGET_UBUNTU -e UBUNTU_ARCH -e OPNFV_GIT_SHA \
+     -u $USER_ID:$GROUP_ID -w $PWD \
+     -v $GITROOT:$GITROOT -v /sys/fs/cgroup:/sys/fs/cgroup:ro $CACHEMOUNT"
+
+diff --git a/build/install/install.sh b/build/install/install.sh
+index c632419..866d304 100755
+--- a/build/install/install.sh
++++ b/build/install/install.sh
+@@ -196,8 +196,12 @@ make_iso_image() {
+     find . -name TRANS.TBL -exec rm {} \;
+     rm -rf rr_moved
+
++    if [[ -z "$OPNFV_GIT_SHA" ]]; then
++        OPNFV_GIT_SHA=$(git rev-parse --verify HEAD)
++    fi
++
+     mkisofs --quiet -r -V "$VOLUMEID" -publisher "$PUBLISHER" \
+-        -p `git rev-parse --verify HEAD` -J -R -b isolinux/isolinux.bin \
++        -p "$OPNFV_GIT_SHA" -J -R -b isolinux/isolinux.bin \
+         -no-emul-boot \
+         -boot-load-size 4 -boot-info-table \
+         --hide-rr-moved \