Make ScalaLibrary properly lazy in java_sources resolution and permit string pointers.
Make ScalaLibrary properly lazy in java_sources resolution and permit string pointers.

ericzundel/commons,brutkin/commons,VaybhavSharma/commons,Yasumoto/commons,nkhuyu/commons,cevaris/commons,brutkin/commons,brutkin/commons,VaybhavSharma/commons,WCCCEDU/twitter-commons,ericzundel/commons,WCCCEDU/twitter-commons,atollena/commons,brutkin/commons,jsirois/commons,ericzundel/commons,jsirois/commons,ericzundel/commons,cevaris/commons,pombredanne/commons,VaybhavSharma/commons,Yasumoto/commons,abel-von/commons,brutkin/commons,jsirois/commons,abel-von/commons,cevaris/commons,nkhuyu/commons,nkhuyu/commons,nkhuyu/commons,WCCCEDU/twitter-commons,pombredanne/commons,jsirois/commons,abel-von/commons,abel-von/commons,cevaris/commons,nkhuyu/commons,atollena/commons,jsirois/commons,Yasumoto/commons,pombredanne/commons,WCCCEDU/twitter-commons,ericzundel/commons,Yasumoto/commons,VaybhavSharma/commons,cevaris/commons,VaybhavSharma/commons,pombredanne/commons,pombredanne/commons,WCCCEDU/twitter-commons,atollena/commons,atollena/commons,atollena/commons,abel-von/commons,Yasumoto/commons