Merge pull request #1618 from YaleSTC/1411_fix_ldap_tests

[1411] Running tests with USE_LDAP enabled outside of Yale breaks things

Author: orenyk

spec/spec_helper.rb

@@ -58,6 +58,7 @@
   # DatabaseCleaner setup (2016-01-04 based on Rails Testing book)
   config.before(:suite) do
     DatabaseCleaner.clean_with(:deletion)
+    ENV.delete('USE_LDAP')
   end
 
   config.before(:each) do