Sets bundle versions 0.1.6-SNAPSHOT

Update the versions in the osgi/p2 files. The version in them needs to be in synch with the version in the pom.xml files.

A simple way to have everything correct is to use the following maven command:

```bash
mvn -Dtycho.mode=maven org.eclipse.tycho:tycho-versions-plugin:set-version -DnewVersion=0.1.6-SNAPSHOT
```