userportal, webadmin: English locale to en_US

- Changed the English locale to be en_US to match the location
pointed to by the documentation.

Change-Id: I8fb5ac34f0e587b533c09bf26c24dcba81e9b41f
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=947176
Signed-off-by: Alexander Wels <awels@redhat.com>