[FIX] sap.m.Input with type Number: entry is cleared unexpectedly
[FIX] sap.m.Input with type Number: entry is cleared unexpectedly

- entry may be cleared unexpectedly in case when both
  type Number and maxLength are defined by the application.

Change-Id: I84c08e483e6af10fa0fb55df4a82166f2ef7fa53
Fixes https://github.com/SAP/openui5/issues/909

SQCLabs/openui5,SQCLabs/openui5,SQCLabs/openui5,SAP/openui5,nzamani/openui5,nzamani/openui5,SAP/openui5,cschuff/openui5,nzamani/openui5,olirogers/openui5,SAP/openui5,cschuff/openui5,SAP/openui5,cschuff/openui5,olirogers/openui5,olirogers/openui5