Metacat

Add the code to read the index field information from the schema.xml.

Add code to handle the solr index information. we still need to figure out how to get the information.

Add the solr engine to the engine list.

use maven to manage most jar dependencies in Metacat.
Exceptions include: LSID, Datamamager (EML),

Add code to handle solr query.

Add a class to handle solr query.

Remove those obsolete index classes.

Merging the METACAT_2_0_6_BRANCH changes for [M|C]NodeService into the trunk.

allow verification date to be updated for replicas (patch from Skye). https://redmine.dataone.org/issues/3699

select only distinct guids (synch may have failed more than once for any given guid)
https://redmine.dataone.org/issues/3539