Update MongoDB version to 2.5.4 development (in advance of 2.6 release)
Set replica set as config key on server member
Rename MongoClientSupport MongoDBClientSupport for consistency with other classes
ReplicaSetConfig sets number of votes on members

Allows a replica set to be resized to up to twelve members and to have
up to seven voting members (the maximums permitted by MongoDB).
MongoDB: Ensure primary gets a vote and there are an odd number of voters
MongoDB: Address review comments

* Removed REPLICA_SET_ENABLED config in favour of isReplicaSetMember()
* Null checks and other miscellaneous fixes
Solr
Add comment describing Solr install
Changed entity name to SolrServer and updated basic configuration
Initial revision of SolrServer entity
Fix broken XML in Solr config file
Updated Solr configuration and test client for tests
bump postgresql suggested version
fix Ec2LiveTest
add install postgresql repositories (yum or apt)
Copied jars from distribution to lib dir
Removed unused JMX interfaces
Added Solr contrib libraries
support for posting yaml app descriptors in the gui
converted *all* tabs to 4 spaces (apart from some library files), as per code review
in add-app-wizard, disable buttons when the user has to select something (template lozenge) / enter text (yaml) -- much better than hiding the buttons, as per @sjcorbett's review
Better error handling and rendering in REST and JS GUI, as per code review