Check for invalid lines (newline, commented entries) from deployment properties file

definition-deploy.js

diff --git a/ui/app/scripts/stream/controllers/definition-deploy.js b/ui/app/scripts/stream/controllers/definition-deploy.js
index 02cace4..416d6fd 100644
--- a/ui/app/scripts/stream/controllers/definition-deploy.js
+++ b/ui/app/scripts/stream/controllers/definition-deploy.js
@@ -64,15 +64,17 @@ define([], function () {
         if (properties) {
           propertiesAsMap = {};
           for (let prop of properties) {
-            var keyValue = prop.split('=');
-            if (keyValue.length===2) {
-              propertiesAsMap[keyValue[0]] = keyValue[1];
-            }
-            else {
-              utils.$log.warn('Invalid deployment property "' + prop +'" must contain a single "=".');
-              $scope.deployDefinitionForm.deploymentProperties.$setValidity('invalidDeploymentProperties', false);
-              return;
-            }
+           if (prop && prop.length > 0 && !prop.startsWith('#')) {
+             var keyValue = prop.split('=');
+             if (keyValue.length===2) {
+               propertiesAsMap[keyValue[0]] = keyValue[1];
+             }
+             else {
+               utils.$log.warn('Invalid deployment property "' + prop +'" must contain a single "=".');
+               $scope.deployDefinitionForm.deploymentProperties.$setValidity('invalidDeploymentProperties', false);
+               return;
+             }
+           }
           }
         }
         $scope.deployDefinitionForm.deploymentProperties.$setValidity('invalidDeploymentProperties', true);