Add perun status to rpc call (rpc api)

- create new methods in DatabaseManager
 - method for DB version
 - method for DB driver version
- for rpc address "/jsonp/utils/getPerunStatus" get information
 - Version of Perun DB
 - Version of Servlet on the machine where perun is running
 - Version of DB driver
 - Version of DB
 - Version of Java Platform
 - Timestamp
Merge pull request #347 from stavamichal/statusOfPerunToRpc

Add perun status to rpc call (rpc api)
Add all db drivers to pom.xml files

 - ojdbc7-12.1.0.1.0
 - orai18n-12.1.0.1.0
 - sqlite-jdbc-3.7.2
 - postgresql-9.1-901.jdbc4
 - sqlite-jdbc-3.7.2
Merge pull request #349 from stavamichal/DB-Drivers_to_poms

Add all db drivers to pom.xml files