Set timeout for functional job
Set timeout for functional job

As functional jobs take more time to finish than unit tests and also
there is a chance that test will hang due to system interaction, this
patch sets maximum execution time to 90 seconds per test.

Change-Id: Ib58a1b53ace178e1bf99150628fa5576b079e8bc

msagheer/networking-plumgrid,openstack/networking-plumgrid,fawadkhaliq/networking-plumgrid,fawadkhaliq/networking-plumgrid,msagheer/networking-plumgrid,stackforge/networking-plumgrid,openstack/networking-plumgrid,stackforge/networking-plumgrid