Updated BOM to latest SNAPSHOT

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Downgraded maven-compiler-plugin

The 3.X series introduces a backwards-incompatible change into the API,
which breaks the tycho-compiler-jdt compiler plugin.

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Only use OpenJDK, OracleJDK is built from it anway.

See https://blogs.oracle.com/henrik/entry/moving_to_openjdk_as_the for
more details.

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Update to latest BOM

Signed-off-by: Sebastian Hoß <mail@shoss.de>
[maven-release-plugin] prepare release java-parent-1.0.2