Changed quoting function for oracleDB.

Change-Id: Ifba624f62702740b6531d0dab082015cd2a235b4
Changed tableName so it returns uppercased table names (+prefix)
Changed tableExists so it returns boolean (and closes resource when
it's done in case it fails)

Change-Id: I4f842a634900756618bb4b3b6d83f86492e73fab
Merge "Changed quoting function for oracleDB."
Merge "Changed tableName so it returns uppercased table names (+prefix) Changed tableExists so it returns boolean (and closes resource when it's done in case it fails)"