keystone client changes in AuthProtocol made our test cases failing

class AuthProtocol from python-keystoneclient project has been
changed. It no longer has the member auth_protocol, auth_port and
auth_host, our test cases need to be changed to test against other
members like auth_uri.

Change-Id: I3af86bb773fef80054bb0ad3820e1b8510bf67cb
fixes: bug #1231491
tests: fix rounding issue in timestamp comparison

Change-Id: I5fad200a97933180bb7ef2e9b6324d4fc7756fbf
Fixes-Bug: #1223346
issue an error log when cannot import libvirt

the ceilometer-compute-agent doesn't issue an error log even if libvirt
couldn't be imported.

This patch fixes this problem.

Change-Id: I91bd80a694983da3eab93866a649a61b09d133c7
Closes-Bug: #1232961
Add bug number of some wsme issue

This patch add bug number of some wsme issue to keep a trace of the
reason of some workaround

Change-Id: I270b498fae3e17c3043396b4d0c08d74554a4f27
Merge "Add bug number of some wsme issue"
Merge "issue an error log when cannot import libvirt"
Merge "tests: fix rounding issue in timestamp comparison"
Merge "keystone client changes in AuthProtocol made our test cases failing"