[FIX] CodeExtensionModules always return an array.
[FIX] CodeExtensionModules always return an array.

CodeExtensions only call sap.ui.require in case there are modules to
load and anways return an array (not arguments).

Change-Id: Ic8c74f865c53593c0a680beb598818792ccb1e53
BCP: 1880589948

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5