Add laravel routes to javascript (#4092)

* Add laravel routes to javascript

This will clean up a lot of passing of urls.  Adds a route() helper and
everything...

This commit also moves the customfield fetching to only be fetched once
and shared with each file, rather than once for each file.

* Try to fix travis unit test things.

* Downgrade doctrine/inflector for php5

* Attempt to occasional seeder issues on travis if the asset does not generate validatable data.

* Update sql dump for functional tests.

* Try to fix api tests.

app/Http/Transformers/ImportsTransformer.php

@@ -29,7 +29,6 @@ class ImportsTransformer
             'header_row' => $import->header_row,
             'first_row'  => $import->first_row,
             'field_map'  => $import->field_map,
-            'process_url'=> route('api.imports.importFile', $import->id),
         ];
 
         return $array;