Put the Logger as Object oriented.
Put the Logger as Object oriented.

There is no need to worry about adding duplicate handler as the logging
has the ability to avoid it.

Change-Id: I7198c1e1c05df347feb0d7192e80592e662314b1
Signed-off-by: helenyao <3eb787ab97713f28a85d5a5517e91512dad61756@huawei.com>

mywulin/functest,opnfv/functest,opnfv/functest,mywulin/functest