Implement config wiring changes related to artifact map and JOST-110:

Implement config wiring changes related to artifact map and JOST-110:
- inject the shibboleth.ParserPool bean into the OpenSAML config, and set on Configuration singleton,
  so we are using a single ParserPool everywhere
- remove shibboleth.ParserPool from being injected on shibboleth.ArtifactMap bean, constructor now deprecated.
These changes are optional and non-disruptive, existing configs will continue to work as-is.

git-svn-id: https://subversion.switch.ch/svn/shibboleth/java-idp/branches/REL_2@2925 ab3bd59b-922f-494d-bb5f-6f0a3c29deca