Allow install os-vif library used by Nova

In future Nova will use os-vif library for some communication with Neutron.
This patch add ability to install os-vif library that requires for run
tempest-jobs for new patches, that used os-vif.

Change-Id: I28e48afd3c740b1aa50c994d99f660f095e7deda
diff --git a/tests/test_libs_from_pypi.sh b/tests/test_libs_from_pypi.sh
index ee11fd2..f01db6d 100755
--- a/tests/test_libs_from_pypi.sh
+++ b/tests/test_libs_from_pypi.sh
@@ -42,7 +42,7 @@
 ALL_LIBS+=" debtcollector os-brick automaton futurist oslo.service"
 ALL_LIBS+=" oslo.cache oslo.reports osprofiler"
 ALL_LIBS+=" keystoneauth ironic-lib neutron-lib oslo.privsep"
-ALL_LIBS+=" diskimage-builder"
+ALL_LIBS+=" diskimage-builder os-vif"
 
 # Generate the above list with
 # echo ${!GITREPO[@]}