fix help message of deprecated command

Adds command name instead of deprecated command to help message.

Change-Id: Ib6cbbcd24bbf015cf3656be9cbdf7de25d4d9cf7
Deprecate 'alarm-update'

Like deprecating alarm-create, we can use alarm-threshold-update and
alarm-combination-update instead of alarm-update.
So, mark alarm-update as 'Deprecated'.

Change-Id: I8c9718d76e40729dc6094611a055c904e27619ba
Checking the type of auth_token, and fixing it if necessary

When creating a new Client object by calling the get_client function,
if the ceilometer_url is not passed as a parameter, but the token is
passed, the auth_token is converted to a lambda function.
However, when both the ceilometer_url and the auth_token are passed,
this conversion does not take place.
This fix checks if the auth_token is a lambda function or not.
If it is not, it creates a new lambda function which returns the
token.
Without this check, if a token was passed as a string, the
python client would throw and error, when trying to call
self.auth_token() in ceilomenterclient/common/http.py.

Change-Id: I3e564fcf17ce497546b75f0ab8c7ca0f6f2099df
Closes-Bug: #1254186
Merge "Checking the type of auth_token, and fixing it if necessary"
Merge "fix help message of deprecated command"
Merge "Deprecate 'alarm-update'"