Platform startup performance improvements

Platform startup performance improvements

1. DB baselining can now be enabled with ontology update checking due to
   caching of TG hash values in the DataContainer.metadata
   map field with key "cached.hashCode". This diminishes the time taken
   by ontology merge need checking to very little time compared to the
   old system where all graph.tg files were loaded completely into heap
   memory to simply check whether they need to be merged or not.

2. BaselineCreator application can be used to construct a baseline with
   a built product in any OS supported by Simantics.

To get the benefit from these changes, you'll also need to use the
version 0.0.9 of the graph-builder-maven-plugin.

refs #7806

Change-Id: I7fadaf43f3c96d3b989a73e0f1ae6e6fa83e09ce