Updated the allocations Gem to 1.0.4

Sometimes the output of Allocations.to_hash may contain garbage. See
https://gitlab.com/gitlab-org/allocations/commit/15d3a39f51392013dcf5f88dd21fab31201350ce
for more information.

Gemfile.lock

@@ -50,7 +50,7 @@ GEM
     after_commit_queue (1.3.0)
       activerecord (>= 3.0)
     akismet (2.0.0)
-    allocations (1.0.3)
+    allocations (1.0.4)
     annotate (2.6.10)
       activerecord (>= 3.2, <= 4.3)
       rake (~> 10.4)