IE8: The arrow indicator of dropdown menus can't be displayed

The arrow indicator of dropdown menus can't be displayed in IE8.

Signed-off-by: Xin Ding <xinding@linux.vnet.ibm.com>
adopt a single log convention

the python's logging.getLogger() can not write to the cherrypy
error_log file.

so we use cherrypy error_log instead of python's logging

Signed-off-by: ShaoHe Feng <shaohef@linux.vnet.ibm.com>
Issue #76 - ImportError: No module named discover

On RHEL with python2.6, even we install the unittest package,
we still run unittest normally, because the test discovery is
added from 2.7, so we must check the python version and use unit2
if under python2.6.

Signed-off-by: Bing Bu Cao <mars@linux.vnet.ibm.com>