use a stable URL for the JBT core tests site
set TP to version 4.1.5.Alpha1-SNAPSHOT, and DO NOT release it as 4.1.5.Final until closer to JBDS IS GA date; instead, we can rev 4.1.5.Alpha2-SNAPSHOT, 4.1.5.Beta1-SNAPSHOT, etc.
Merge pull request #119 from nickboldt/use-stable-JBT-tests-URL-and-version

set TP to version 4.1.5.Alpha1-SNAPSHOT, and DO NOT release it as 4.1.5.Final until closer to JBDS IS GA date; instead, we can rev 4.1.5.Alpha2-SNAPSHOT, 4.1.5.Beta1-SNAPSHOT, etc. >> master