Adding armoury feature

Adding armoury feature

1) Feature Tests Pass: https://jenkins.opendaylight.org/releng/view/armoury/job/armoury-merge-beryllium/

2) Features Comply with Guidelines: https://git.opendaylight.org/gerrit/gitweb?p=armoury.git;a=blob;f=features/src/main/features/features.xml;h=dbcccd7b51392c2d9b31c464356bb4e2f1fb1046;hb=HEAD
a) Feature Names: odl-armoury-workloadmanager
b) Features Descriptions: Present
c) Features Start-Levels: N/A

3) Features Tested: Features have been tested for functionality with
a) feature:install odl-armoury-workloadmanager
b) feature:install odl-armoury-workloadmanager odl-integration-compatible-with-all

4) Integration Test Impact: N/A

Change-Id: I4dd6bdb8dda0da805605cef5e244d97b619a54b6
Signed-off-by: adetalhouet <adetalhouet@inocybe.com>