CDB-3238
Merge branch 'master' into CDB-3238
CDB-3238
Merge pull request #542 from CartoDB/CDB-3238

Tested at staging
Plug connection leaks in all specs
Merge pull request #544 from strk/leaks

Plug connection leaks in all specs
CDB-3098 fix to avoid search_path fail upon extension install
CDB-3098 add_python also called at load functions, so disabling there cartodb from search_path
CDB-2891 bugfix.non static attribute access inside static scope
CDB-3098 Another typo and another log
Merge branch 'master' into CDB-3098