[INTERNAL] sap.ui.model.odata.AnnotationHelper: added type Guid

PS2: PP with TCH; added integration test
PS3: removed unused property and adjusted whitespaces
PS4: comments from HMU; added missing files to explored app, rebase

Change-Id: I17ca39a2ccc6a3563848e78bc640e86a36bf4203
JIRA: FLPUISERVICES2014-984
Merge "[INTERNAL] sap.ui.model.odata.AnnotationHelper: added type Guid"