CRM-2148: Magento Integration: Detached entities issue after EM fail
   - fix issue after rollback DoctrineHelper#merge returns null
   - remove reduntant code from customer strategy
CRM-2148: Magento Integration: Detached entities issue after EM fail
    - remove not used code from customer strategy
CRM-2148: Magento Integration: Detached entities issue after EM fail
   - move logic to serializer
CRM-2148: Magento Integration: Detached entities issue after EM fail
   - fix issues with detached entities
CRM-2148: Magento Integration: Detached entities issue after EM fail
   - remove reduntant code
   - fix store deserialization in order denormalizer
BAP-5955: Exception as INFO is logged in prod mode
BAP-5955: Exception as INFO is logged in prod mode
Merge pull request #1246 from laboro/fix/BAP-5955_1.4

Fix/bap 5955 1.4
Merge pull request #1238 from laboro/ticket/CRM-2148-1.4

CRM-2148 Magento Integration: Detached entities issue after EM fail
Merge remote-tracking branch 'remotes/dev/1.4' into 1.4
Merge remote-tracking branch 'remotes/dev/1.4' into 1.4