CAY-1883 - Clean up Cayenne maven structure - get rid of aggregate modules

* moving cayenne-core-unpublished  to cayenne-core and one level up... it is 'published' now

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1542567 13f79535-47bb-0310-9956-ffa450edef68
CAY-1883 - Clean up Cayenne maven structure - get rid of aggregate modules

* moving cayenne-client, cayenne-server one level up to follow their Maven coordinates

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1542571 13f79535-47bb-0310-9956-ffa450edef68
CAY-1883 - Clean up Cayenne maven structure - get rid of aggregate modules

* better naming of the new modules

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1542572 13f79535-47bb-0310-9956-ffa450edef68