Revert "Bumped to the most recent release of plugin-profiles"

This reverts commit d8ddbbe79ee416ac40944eb87e4335d66078c8d3.
Revert "Fixed source compatibility with latest Scala IDE master"

This reverts commit 9e83a5f42b12315ef96871d5d04624560030b799.
Adds a local impletation of the version checker

It is not available in the test tools from Scala IDE 3.0.x.