Revert ":cut: remove unnecessary rescue Exceptions"

This reverts commit ff18049ca6f27deb7e7f955478e1464f8d756332.

This broke the AR build for every adapter:

      1) Error:
    AssociationCallbacksTest#test_dont_add_if_before_callback_raises_exception:
    Exception: You can't add a post

      2) Failure:
    QueryCacheTest#test_query_cache_doesnt_leak_cached_results_of_rolled_back_queries [/Users/senny/Projects/rails/activerecord/test/cases/query_cache_test.rb:235]:
    Expected: 1
      Actual: 0

I'm reverting to get the build green again.

1 files changed, 1 insertions, 1 deletions

diff --git a/activerecord/test/cases/query_cache_test.rb b/activerecord/test/cases/query_cache_test.rb
index a5f8776f77..744f9edc47 100644
--- a/activerecord/test/cases/query_cache_test.rb
+++ b/activerecord/test/cases/query_cache_test.rb
@@ -235,7 +235,7 @@ class QueryCacheTest < ActiveRecord::TestCase
         assert_equal 1, Post.where(title: 'rollback').to_a.count
         raise 'broken'
       end
-    rescue
+    rescue Exception
     end
 
     assert_equal 0, Post.where(title: 'rollback').to_a.count