Bug fix from 3.6.4 missing in 3.7

vertx-config/src/main/java/io/vertx/config/impl/spi/PropertiesConfigProcessor.java

@@ -116,6 +116,12 @@ public JsonObject readAsJson(JsonObject configuration, InputStream byteStream) t
 
     private JsonObject toJson(Stream<String> stream) {
       return stream
+        .filter( line -> {
+        	line.trim();
+        	return  !line.isEmpty()
+        			&& !line.startsWith("#")
+        			&& !line.startsWith("!");
+          })
         .map(line -> line.split("="))
         .map(raw -> {
           String property = raw[0].trim();

vertx-config/src/test/resources/file/hierarchical.properties

@@ -1,5 +1,29 @@
+#
+# Copyright (c) 2014 Red Hat, Inc. and others
+#
+# Red Hat licenses this file to you under the Apache License, version 2.0
+# (the "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+#
+
+# some properties
 server.port=8080
+!# server.port=8081
+#! server.port=8081
 server.host=http://localhost
 some.double.value=1.0
+
 some.integer.values=1,2,3
+! Some comments
 single=0
+
+