This adds a unicode_literals import to the fileserver code, and also ensures
that we return unicode paths from the serialized file/env list caches
(which when deserialized are still encoded str types on PY2).
It also adds a test and modifies a few other existing tests to confirm
that unicode paths/envs are returned *as unicode* in the return data.
This also adds "fs" to all of the fileserver virtualnames which did not
already have them. This both A) normalizes the usage of the non-roots
backends, and B) makes it easier for the FileserverUpdate process to get
the default update interval for each backend from the opts.
Without allow_unicode=True, unicode characters are processed through the
str representer and on Python 2 are dumped as a Unicode code point (i.e.
a literal \u0414). This commit makes allow_unicode=True the default in
our salt.utils.yamlloader.safe_dump() helper. It also adds a new
salt.utils.yamlloader.dump() helper which wraps yaml.dump() and also
makes allow_unicode=True the default.
To make importing and using our custom yaml loader/dumper easier, a
convenience module called salt.utils.yaml has been added, which does a
wildcard import from both salt.utils.yamldumper and
salt.utils.yamlloader.
Refs to yaml.load/dump and yaml.safe_load/safe_dump have been updated to
salt.utils.yaml, to ensure that unicode is handled properly.
This reduces some of the overhead caused by many concurrent fileclient
requests from minions.
Additionally, initializing remotes has been folded into the GitBase
class' dunder init. Instantiating an instance and initializing its
remotes were initially split so that an object could simply be created
with the master opts so that the configuration was loaded and nothing
else, allowing for certain cases (like clearing the cache files) where
we didn't need to actually initialize the remotes. But this both A)
presents a problem when the instance being used is a singleton, as you
don't want to be re-initializing the remotes all the time, and B)
suppressing initialization can be (and is now being) done via a new
argument to the dunder init.
