Fix spelling errors in comments

Change-Id: Icc8f26d8df00e52ef10781c91071356daa799afa
Merge "Fix spelling errors in comments"
Discontinue usage of oslo-rootwrap

Rootwrap should be used from specific console_scripts calling into
oslo.rootwrap.cmd:main, rather than using the specific oslo-rootwrap
wrapper. This matches how nova and cinder now consume oslo.rootwrap,
and ensures a smooth upgrade path.

This change aligns the documentation and shipped files to match how
oslo.rootwrap should be used now.

Change-Id: If01b8840c971d1c6d5c88c7698f5d6a2bf8fd5f0
Trivial changes from oslo-incubator

A number of trivial changes were merged to the oslo-incubator copy of
the rootwrap code while the code was being graduated. Those changes
should have been rejected (as the code was frozen while in graduation)
and applied to oslo.rootwrap instead.

Now that the oslo-incubator copy of the code was removed, we should
reapply those trivial changes to oslo.rootwrap instead, otherwise they
will just be lost:

* Remove vim header (original author: jogo)
* Make vertical white space after license header consistent (noorul)
* Removed copyright from empty files (jay-lau)

Change-Id: I0403335b8ec151e2337d50935be18355cc55a199