Trim project_path whitespace on form submit

When the form is submitted, any leading and/or trailing whitespace is trimmed.

CHANGELOG.md

@@ -2,6 +2,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 ## 8.14.0 (2016-11-22)
   - Adds user project membership expired event to clarify why user was removed (Callum Dryden)
+  - Trim leading and trailing whitespace on project_path (Linus Thiel)
   - Fix HipChat notifications rendering (airatshigapov, eisnerd)
   - Simpler arguments passed to named_route on toggle_award_url helper method

app/views/projects/new.html.haml

@@ -127,6 +127,11 @@
     }
   });
+  $('#new_project').submit(function(){
+    var $path = $('#project_path');
+    $path.val($path.val().trim());
+  });
+
   $('#project_path').keyup(function(){
     if($(this).val().length !=0) {
       $('.btn_import_gitlab_project').attr('disabled', false);