[2015.8] Revert loader changes from #26645

[basepi]

Also change sentry handler to work without that code.

@s0undt3ch Look good? I couldn't find the original version of the sentry handler and wanted to make sure I didn't do anything stupid.

Fixes #26669

[s0undt3ch]

Yep. Looks good!

[basepi]

Go Go Jenkins!

[rallytime]

@basepi Looks like we're hitting another bug now. I just pulled this is and now i'm getting the following error:

# salt-cloud --list-images linode
[ERROR   ] Failed to import log_handlers sentry_mod, this is due most likely to a syntax error:
Traceback (most recent call last):
  File "/root/SaltStack/salt/salt/loader.py", line 1105, in _load_module
    ), fn_, fpath, desc)
  File "/root/SaltStack/salt/salt/log/handlers/sentry_mod.py", line 96, in <module>
    __grains__ = salt.loader.grains(__opts__)
NameError: name '__opts__' is not defined
[INFO    ] salt-cloud starting

[rallytime]

Ah...I meant to put this on the issue. I'll comment there and open it again.