EZP-21958: Added coverage for Common config parser
EZP-21958: Added coverage for Content config parser
EZP-21958: Added coverage for [Block|Location|Content] config parser
EZP-21958: Added coverage for Templates config parser
EZP-21958: Added coverage for Image config parser
EZP-21958: Added coverage for Page config parser
Merge pull request #624 from ezsystems/implement_EZP-21958_coverageConfigParsers

Fix EZP-21958: Increase code coverage for EzPublishCoreBundle config parsers