make MySQL pass our tests under 5.6

Conflicts:
	test/db/mysql/connection_test.rb

Author: kares

test/db/mysql/connection_test.rb

@@ -8,8 +8,14 @@ def test_mysql_default_in_strict_mode
 
   def test_mysql_strict_mode_disabled
     run_without_connection do |orig_connection|
-      ActiveRecord::Base.establish_connection(orig_connection.merge({:strict => false}))
-      assert_equal [['']], select_rows("SELECT @@SESSION.sql_mode") if ! mariadb_driver?
+      ActiveRecord::Base.establish_connection(orig_connection.merge(:strict => false))
+      sql_mode = select_rows("SELECT @@SESSION.sql_mode")
+      version = ActiveRecord::Base.connection.send(:version)
+      if version[0] > 6 || ( version[0] == 5 && version[1] >= 6 )
+        assert ! sql_mode.flatten.include?("STRICT_ALL_TABLES")
+      else
+        assert_equal [['']], sql_mode unless mariadb_driver?
+      end
     end
   end