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, 48 insertions, 0 deletions

diff --git a/patches/fuel-plugin-ovs/0001-Cleanup-Use-dget-instead-of-wget-dpkg-source.patch b/patches/fuel-plugin-ovs/0001-Cleanup-Use-dget-instead-of-wget-dpkg-source.patch
new file mode 100644
index 00000000..4c2283f4
--- /dev/null
+++ b/patches/fuel-plugin-ovs/0001-Cleanup-Use-dget-instead-of-wget-dpkg-source.patch
@@ -0,0 +1,48 @@
+From: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+Date: Fri, 24 Jun 2016 16:51:41 +0200
+Subject: [PATCH] Cleanup: Use dget instead of wget+dpkg-source.
+
+We already install devscripts, which provides dget.
+
+See [1] for using `dget -x -u` to accelerate/simplify code dev.
+
+FIXME: Remove `-u` when we add Ubuntu signing keys to builder
+docker keyring.
+
+[1] https://debian-administration.org/article/
+    504/Downloading_Debian_source_packages_easily
+
+Change-Id: Ifbcac2a14c7b34216894adb7c5c4e921bf556e33
+Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+---
+ ovs_build/build-ovs-nsh-dpdk.sh | 10 ++--------
+ 1 file changed, 2 insertions(+), 8 deletions(-)
+
+diff --git a/ovs_build/build-ovs-nsh-dpdk.sh b/ovs_build/build-ovs-nsh-dpdk.sh
+index 1b42df1..3d7edea 100755
+--- a/ovs_build/build-ovs-nsh-dpdk.sh
++++ b/ovs_build/build-ovs-nsh-dpdk.sh
+@@ -17,10 +17,7 @@ sudo apt-get -y install devscripts dpkg-dev git wget
+ rm -rf ${BUILD_HOME}; mkdir -p ${BUILD_HOME}
+
+ cd ${BUILD_HOME}
+-wget -c https://launchpad.net/ubuntu/+archive/primary/+files/dpdk_2.2.0-0ubuntu8.dsc
+-wget -c https://launchpad.net/ubuntu/+archive/primary/+files/dpdk_2.2.0.orig.tar.gz
+-wget -c https://launchpad.net/ubuntu/+archive/primary/+files/dpdk_2.2.0-0ubuntu8.debian.tar.xz
+-dpkg-source -x dpdk_2.2.0-0ubuntu8.dsc
++dget -x -u https://launchpad.net/ubuntu/+archive/primary/+files/dpdk_2.2.0-0ubuntu8.dsc
+
+ # copy from debian/control
+ sudo apt-get install -y debhelper \
+@@ -49,10 +46,7 @@ cd ${BUILD_HOME}; sudo dpkg -i *.deb
+ apt-get download libxenstore3.0
+
+ cd ${BUILD_HOME}
+-wget -c https://launchpad.net/ubuntu/+archive/primary/+files/openvswitch-dpdk_2.4.0.orig.tar.gz
+-wget -c https://launchpad.net/ubuntu/+archive/primary/+files/openvswitch-dpdk_2.4.0-0ubuntu1.dsc
+-wget -c https://launchpad.net/ubuntu/+archive/primary/+files/openvswitch-dpdk_2.4.0-0ubuntu1.debian.tar.xz
+-dpkg-source -x openvswitch-dpdk_2.4.0-0ubuntu1.dsc
++dget -x -u https://launchpad.net/ubuntu/+archive/primary/+files/openvswitch-dpdk_2.4.0-0ubuntu1.dsc
+
+ # copy from debian/control
+ sudo apt-get install -y autoconf \