Bug 547894: Baseline replace must happen after pack200

The configuration for baseline replacement needs to be split.

This may be a bug in Tycho, but I cannot tell. It seems to me the
configuration about ignoredPatterns should be read from the
configuration block in the execution block, but it isn't.

Change-Id: I35e3f4007b0afc21d8bd81d5b07f76581879bc76