[FIX] datajs: add normalizeHeader call to normalize response headers
[FIX] datajs: add normalizeHeader call to normalize response headers

Fixes https://github.com/SAP/openui5/issues/194
Change-Id: I879ec99a1502c76c97bf674e0125cc2ffe391627
BCP: 1472015533
SQCLabs/openui5,SQCLabs/openui5,cschuff/openui5,nzamani/openui5,olirogers/openui5,SAP/openui5,SAP/openui5,SAP/openui5,nzamani/openui5,olirogers/openui5,SAP/openui5,SQCLabs/openui5,cschuff/openui5,nzamani/openui5,cschuff/openui5,olirogers/openui5