The SfcProviderRenderedPathAPITest unit tests fail intermittently

I submit a patch to stable/lithium that failed due to a failure in the SfcProviderRenderedPathAPITest unit tests.

Patch:
https://git.opendaylight.org/gerrit/#/c/22800/1

Jenkins failure:
https://jenkins.opendaylight.org/releng/job/sfc-verify-stable-lithium/jdk=openjdk7,nodes=dynamic_verify/37/console

The patch submit is in SFCOFL2 and has absolutely nothing to do with the Unit Tests in question. I pulled the latest version of SFC stable/lithium without the above mentioned patch and ran the unit tests in question. Out of 10 executions, they failed 2 times. I made no changes in between executions, so they fail randomly/intermittently.

This needs to be fixed in stable/lithium ASAP as its blocking necessary patches from going in, and we cant have this sort of behavior in Lithium.