Fix #673: Bring back Java 7 support

[olivergondza]

• Project depends on 1.7
• Controllers affected by JDK-7157360 depends on 1.8
• distribution module depends on openstack4j-resteasy

[olivergondza]

I managed to get the build to pass on JDK 7 using mvn clean install -pl '!org.pacesys.openstack4j.connectors:openstack4j-http-connector,!org.pacesys.openstack4j.connectors:openstack4j-jersey2,!org.pacesys:it-jersey2' (skipping affected controllers). Except for integration tests that does not work for me with Java 8 either.

[gondor]

@auhlig and @dhague can you review this

[dhague]

LGTM - nice work!

[gondor]

@dhague @olivergondza @auhlig

for some reason Travis which runs "mvn test -B" passes but trying to deploy which goes through "mvn verify" fails. I was trying to cut a release this morning. Can someone find out why some groovy tests are failing using "mvn verify" ? If not we'll have to revert this change.

Common error seen:

Running org.openstack4j.api.identity.v3.KeystoneProjectServiceSpec
Jun 01, 2016 7:05:48 AM org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSiteNoUnwrap invoke
INFO: local address is loopback, using hostname C02Q41AMG8WM-M.local
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.121 sec <<< FAILURE! - in org.openstack4j.api.identity.v3.KeystoneProjectServiceSpec
create, read, update, delete project service test cases(org.openstack4j.api.identity.v3.KeystoneProjectServiceSpec)  Time elapsed: 0.12 sec  <<< ERROR!
java.lang.AbstractMethodError: javax.ws.rs.core.UriBuilder.uri(Ljava/lang/String;)Ljavax/ws/rs/core/UriBuilder;
    at org.openstack4j.api.identity.v3.KeystoneProjectServiceSpec.create, read, update, delete project service test cases(KeystoneProjectServiceSpec.groovy:77)

[auhlig]

I guess mvn test runs only the unit tests. But the integration-tests are only executed in the integration-phase which is a previous phase of verify.

[gondor]

Ok, gonna update travis to always test using "mvn verify"

[auhlig]

Yes. Sorry. Should have thought of that before.