Handle some exceptions of image_create v2 api

Currently, in image_create v2 api source we can see
ReservedProperty, ReadonlyProperty and TypeError caused in
glance/domain/__init__.py are not handled, which will cause
500 when these exceptions happens.The internal error should
be interpreted to the appropriate exception to the user.
This patch catches them and changes them to http exception.

Change-Id: I0c82a142b3357c8b8faab7dc0905967983cb8f7c
Separate glance and eventlet wsgi logging

The log output from both glance.common.wsgi and
eventlet.wsgi have the same prefix:

glance.wsgi.server [-] Started child 3679
glance.wsgi.server [-] (3679) wsgi starting up on http://0.0.0.0:80/

It's better to have them separated, eg:

glance.common.wsgi [-] Started child 3729
eventlet.wsgi.server [-] (3729) wsgi starting up on http://0.0.0.0:80/

(This matches, for example, the Cinder behaviour.)

Change-Id: Ic42a2966e63270a6a9fed4eeb3b7737ca25b8c1d
Closes-bug: #1382585
Removal of unnecessary sample file from repository

Sample file (etc/logging.cnf.sample) is not needed anymore,
since we use openstack common logging now. So, I am removing this file from
Glance repository.

Closes-Bug: #1163075

Change-Id: I7b769998983f34840d525bd3ead4dc38e03f4602
Merge "Removal of unnecessary sample file from repository"
Merge "Separate glance and eventlet wsgi logging"
Merge "Handle some exceptions of image_create v2 api"