bump fixture_builder to 5.2rc3

closes #7849

Gemfile

@@ -275,7 +275,7 @@ end
 group :test do
   # RSpec (unit tests, some integration tests)
 
-  gem "fixture_builder",   "0.5.1"
+  gem "fixture_builder",   "0.5.2.rc3"
   gem "fuubar",            "2.3.1"
   gem "json-schema-rspec", "0.0.4"
   gem "rspec-json_expectations", "~> 2.1"

Gemfile.lock

@@ -218,9 +218,10 @@ GEM
     faraday_middleware (0.12.2)
       faraday (>= 0.7.4, < 1.0)
     ffi (1.9.23)
-    fixture_builder (0.5.1)
+    fixture_builder (0.5.2.rc3)
       activerecord (>= 2)
       activesupport (>= 2)
+      hashdiff
     fog-aws (2.0.1)
       fog-core (~> 1.38)
       fog-json (~> 1.0)
@@ -792,7 +793,7 @@ DEPENDENCIES
   faraday (= 0.12.2)
   faraday-cookie_jar (= 0.0.6)
   faraday_middleware (= 0.12.2)
-  fixture_builder (= 0.5.1)
+  fixture_builder (= 0.5.2.rc3)
   fog-aws (= 2.0.1)
   fuubar (= 2.3.1)
   gon (= 6.2.0)
@@ -906,4 +907,4 @@ DEPENDENCIES
   will_paginate (= 3.1.6)
 
 BUNDLED WITH
-   1.16.2
+   1.16.4