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, 46 insertions, 0 deletions

diff --git a/patches/fuel-library/0002-ceilometer-Fix-libvirt-bin-group-name-for-armband.patch b/patches/fuel-library/0002-ceilometer-Fix-libvirt-bin-group-name-for-armband.patch
new file mode 100644
index 00000000..17700a9a
--- /dev/null
+++ b/patches/fuel-library/0002-ceilometer-Fix-libvirt-bin-group-name-for-armband.patch
@@ -0,0 +1,46 @@
+From: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+Date: Mon, 18 Apr 2016 18:44:27 +0200
+Subject: [PATCH] ceilometer: Fix libvirt-bin group name for armband.
+
+Upstream mirrors use a custom version of libvirt, ported from
+Debian, while keeping the Ubuntu ceilometer package, leading to a
+libvirt group name mismatch between the two.
+
+Fuel-library hardcodes a deb-version test for libvirt-bin, which
+enforces the use of "libvirt" instead of "libvirtd" for 1.2.9 or
+newer libvirt-bin [1].
+
+Armband brings its own 1.3.2 libvirt-bin package, which respects
+Ubuntu standard group naming ("libvirtd"), but since 1.3.2 > 1.2.9,
+the old group name ("libvirt") is still used.
+
+This patch extends the version checking introduced in [1]:
+ - libvirt-bin 1.3.2 or newer will use "libvirtd" naming;
+ - libvirt-bin 1.2.9 ... <1.3.2 will use "libvirt".
+
+[1] https://review.openstack.org/#/c/200602/8/deployment/puppet/
+    openstack/manifests/ceilometer.pp
+---
+ deployment/puppet/openstack_tasks/manifests/ceilometer/compute.pp | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/deployment/puppet/openstack_tasks/manifests/ceilometer/compute.pp b/deployment/puppet/openstack_tasks/manifests/ceilometer/compute.pp
+index af4f0e5..e8dbfcf 100644
+--- a/deployment/puppet/openstack_tasks/manifests/ceilometer/compute.pp
++++ b/deployment/puppet/openstack_tasks/manifests/ceilometer/compute.pp
+@@ -93,8 +93,14 @@ class openstack_tasks::ceilometer::compute {
+     }
+
+     if $::operatingsystem == 'Ubuntu' and $::ceilometer::params::libvirt_group {
++      # Armband libvirt-bin deb package (1.3.2 version) creates 'libvirtd' group on Ubuntu
++      if (versioncmp($::libvirt_package_version, '1.3.2') >= 0) {
++        User<| name == 'ceilometer' |> {
++          groups => ['nova', 'libvirtd'],
++        }
++      }
+       # Our libvirt-bin deb package (1.2.9 version) creates 'libvirt' group on Ubuntu
+-      if (versioncmp($::libvirt_package_version, '1.2.9') >= 0) {
++      elsif (versioncmp($::libvirt_package_version, '1.2.9') >= 0) {
+         User<| name == 'ceilometer' |> {
+           groups => ['nova', 'libvirt'],
+         }