[INTERNAL] sap.ui.base.SyncPromise: refactoring
[INTERNAL] sap.ui.base.SyncPromise: refactoring

PS1: move methods to prototype; alphabetic order

Change-Id: Ic922d9df4a46674e37022f95e07ebadf4fa3b85b

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