Cleanup of classpath entries

-com.ibm.sbt.core had a WAS library on the classpath, that plugin isn't specific to WAS so I don't think it should be there
-com.ibm.sbt.bootstrap211 had a JRE on the classpath which is not necessary since the plugin is just serving up bootstrap
-com.ibm.sbt.jquery180 had a JRE on the classpath which is not necessary since the plugin is just serving up jquery