Set shared throughput default to false for New Databases (#1981)

* Introduce common function for shared throughput default and set to
false.

* Add new file.

* Adjust E2E tests to not set throughput for database create.

src/Common/DatabaseUtility.ts

@@ -0,0 +1,3 @@
+export function getNewDatabaseSharedThroughputDefault(): boolean {
+  return false;
+}