Fix invalid config perperties (#839)

Change-Id: I6bd251aeb50eccc2210dd863c111f0c9adb7ffa5

serving/serving/src/main/conf/config.properties

@@ -2,7 +2,7 @@
 # inference_address=http://127.0.0.1:8080
 # management_address=http://127.0.0.1:8080
 # management_address=unix:/tmp/management.sock
-model_store=models # $MODEL_SERVER_HOME/models
+model_store=models
 load_models=ALL
 # model_url_pattern=.*
 # number_of_netty_threads=0
@@ -13,9 +13,9 @@ load_models=ALL
 # cors_allowed_origin=*
 # cors_allowed_methods=*
 # cors_allowed_headers=*
-# keystore=conf/keystore.p12 # $MODEL_SERVER_HOME/conf
+# keystore=conf/keystore.p12
 # keystore_pass=changeit
 # keystore_type=PKCS12
-# private_key_file=conf/key.pem  # $MODEL_SERVER_HOME/conf
-# certificate_file=conf/certs.pem  # $MODEL_SERVER_HOME/conf
+# private_key_file=conf/key.pem
+# certificate_file=conf/certs.pem
 # max_request_size=10485760