- Move ActiveMQTestBase to artemis-test-support.
- Add reduced parent for current artemis-server tests.
- Add a simpler test case parent class unit tests can use.
- Convert some existing checks into a rule for reuse.
- Move various rules/utils to artemis[-unit]-test-support module from where they can be used instead of from artemis-server.
The system property `artemis.extra.libs` is a comma separated list of
directories that contains jar files, i.e.
```
-Dartemis.extra.libs=/usr/local/share/java/lib1,/usr/local/share/java/lib2
```
The environment variable `ARTEMIS_EXTRA_LIBS` is a comma separated list of
directories that contains jar files and is ignored if the system property
`artemis.extra.libs` is defined, i.e.
```
export ARTEMIS_EXTRA_LIBS=/usr/local/share/java/lib1,/usr/local/share/java/lib2
```