Bump 1.6.4 version for Frankfurt maintenance release

This new version includes minor fixes for ue case support

Issue-ID: INT-1652

Signed-off-by: mrichomme <morgan.richomme@orange.com>
Change-Id: I773d78906c5b32678e58eafe825ba12059ff52cf
(cherry picked from commit 44a38a594677ca38c4eea288908ebf503ad91b4e)
1 file changed