Fix names of "refs/users/" constants

It should be REFS_USERS instead of REFS_USER and REFS_USERS_DEFAULT
instead of REFS_USER_DEFAULT. Using the plural form is consistent with
the naming of the other ref constants and matches the real ref names.

Change-Id: I9243e16c51ba45aada9522dfab76f1eb9597076e
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
5 files changed