Strip shorter prefix in scabot
Strip shorter prefix in scabot

To deal with mix of scala-2.11.x-integrate-* and
scala-2.11.x-validate-* jobs.

scala/scabot,scala/scabot,SethTisue/scabot,SethTisue/scabot,adriaanm/scabot,SethTisue/scabot,adriaanm/scabot,adriaanm/scabot