simulate: allow Exiting on user Command in any place of the line

bin/epm-simulate

@@ -36,8 +36,7 @@ __check_yum_result()
 {
     grep "^No package" $1 && return 1
     grep "^Complete!" $1 && return 0
-    grep "^Exiting on user Command" $1 && return 0
-    grep "^Exiting on user command" $1 && return 0
+    grep "Exiting on user [Cc]ommand" $1 && return 0
     # dnf issue
     grep "^Operation aborted." $1 && return 0
     # return default result by default