revert patch - because broke HEAD build with message

 #error "lustre_msg_v1 has been deprecated since 1.6.0, please remove it"
need too complex patch.

lustre/autoconf/lustre-version.ac

 m4_define([LUSTRE_MAJOR],[1])
-m4_define([LUSTRE_MINOR],[9])
-m4_define([LUSTRE_PATCH],[50])
+m4_define([LUSTRE_MINOR],[7])
+m4_define([LUSTRE_PATCH],[91])
 m4_define([LUSTRE_FIX],[0])
 
 dnl # liblustre delta is 0.0.1.32 , next version with fixes is ok, but