Fix non-camelcased name.

Thanks, @houndci.

frontend/app/work_packages/directives/work-package-column-directive.js

@@ -114,18 +114,18 @@ module.exports = function(PathHelper, WorkPackagesHelper, UserService){
       function displayDataAsLink(id) {
         // Example of how we can look to the provided meta data to format the column
         // This relies on the meta being sent from the server
-        var link_meta = scope.column.meta_data.link;
+        var linkMeta = scope.column.meta_data.link;
-        if (link_meta.model_type === 'work_package') {
+        if (linkMeta.model_type === 'work_package') {
           scope.displayType = 'ref';
           scope.stateRef = 'work-packages.show.activity({workPackageId: ' + id + '})';
         } else {
           scope.displayType = 'link';
-          scope.url = getLinkFor(id, link_meta);
+          scope.url = getLinkFor(id, linkMeta);
         }
       }
 
-      function getLinkFor(id, link_meta){
+      function getLinkFor(id, linkMeta){
-        switch (link_meta.model_type) {
+        switch (linkMeta.model_type) {
           case 'user':
             if (scope.workPackage[scope.column.name] && scope.workPackage[scope.column.name].type == 'Group') {
               // if it's a group, we have nothing to link to