Make POST for bulk delete actually work

Change-Id: I568e7e31df3dcbeac20dba6d543a13c0409de00e
Closes-Bug: 1232787
Update account quota doc

A note was added stating that the same limitations apply to
account quotas as for container quotas. An example on uploads
without a content-length headers was added.

Related-Bug: 1267659
Change-Id: Ic29b527cb71bf5903c2823844a1cf685ab6813dd
Add missing license header to test file

All the other tests have license headers, so this one should too.

I picked 2013 for the copyright year because that's when "git log"
says it was first and last touched.

Change-Id: Idd41a179322a3383f6992e72d8ba3ecaabd05c47
Allow programmatic reloading of Swift hash path config

New util's function validate_hash_conf allows you to programmatically reload
swift.conf and hash path global vars HASH_PATH_SUFFIX and HASH_PATH_PREFIX
when they are invalid.

When you load swift.common.utils before you have a swift.conf there's no good
way to force a re-read of swift.conf and repopulate the hash path config
options - short of restarting the process or reloading the module - both of
which are hard to unittest.  This should be no worse in general and in some
cases easier.

Change-Id: I1ff22c5647f127f65589762b3026f82c9f9401c1
Merge "Add missing license header to test file"
Merge "Make POST for bulk delete actually work"
Merge "Allow programmatic reloading of Swift hash path config"
Merge "Update account quota doc"