Revision 1562574

PROTON-253, PROTON-417, and PROTON-499: This change consits mostly of
moving stuff around to avoid using the "test-jar" mechanism introduced
into the proton-j build a while ago. It appears that use of this
mechanism causes the maven build to be circularly self-dependent, i.e.
it requires an older stale binary version of its own output in order
to successfully complete the mvn compile stage. There are also some
fairly small code changes included that make the bouncycastle
dependency a runtime dependency rather than a compile-time dependency.