=doc,osg Effort to get OSGi integration tests running again

* Update protobuf dependency so mvn clean install runs again
* Bump OSGi version range in AkkaBuild to include current 2.3 for generated manifests
* Update path in dev documentation to correct TexBasic folder
Merge pull request #1817 from sandermak/osgi-sample-improvements

=doc,osg Effort to get OSGi integration tests running again