This introduces two new cloudstack packages: marvin and integration-tests.
The two packages will make it easier for CI systems to install Marvin for a
specific cloudstack release/build and run integration tests that are specific
for that version/build.
- maven: add explicit juniper-contrail-api maven repository
- marvin: build source distribution for both install and package mvn phases
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>