remove use of oracle for plugins
move the online part which depends on oracle (occi) out to new package OnlineDB/HcalCondDB/; update CondTools/Hcal/BuildFile.xml to remove oracle and occi
use headers from this package, not from CondTools/Hcal
use headers from this package, not from CondTools/Hcal also in bin/ (which is actually not build)
Merge pull request #6465 from apfeiffer1/noOracleInHcalPlugin72x

remove use of oracle for plugins, 72x version