Set config file to db sync and other manage operation

Currently, the db sync operation does not specify the config dir or
config file.
If there is a config file in the home path, it will use this one,
but not the right one devstack write.

Set config file to these operations.

Change-Id: Id1fbc3d85280c19596f5ebd301c46bcf018fa2f6
Closes-Bug: #1578098
diff --git a/lib/keystone b/lib/keystone
index bcd5fab..6a202e5 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -489,16 +489,16 @@
     recreate_database keystone
 
     # Initialize keystone database
-    $KEYSTONE_BIN_DIR/keystone-manage db_sync
+    $KEYSTONE_BIN_DIR/keystone-manage --config-file $KEYSTONE_CONF db_sync
 
     if [[ "$KEYSTONE_TOKEN_FORMAT" == "pki" || "$KEYSTONE_TOKEN_FORMAT" == "pkiz" ]]; then
         # Set up certificates
         rm -rf $KEYSTONE_CONF_DIR/ssl
-        $KEYSTONE_BIN_DIR/keystone-manage pki_setup
+        $KEYSTONE_BIN_DIR/keystone-manage --config-file $KEYSTONE_CONF pki_setup
     fi
     if [[ "$KEYSTONE_TOKEN_FORMAT" == "fernet" ]]; then
         rm -rf "$KEYSTONE_CONF_DIR/fernet-keys/"
-        $KEYSTONE_BIN_DIR/keystone-manage fernet_setup
+        $KEYSTONE_BIN_DIR/keystone-manage --config-file $KEYSTONE_CONF fernet_setup
     fi
 }