JIRA: BOTTLENECK-123
This code is for Bottlenecks to have a common way to parser config.
those config are divided into three part: common config, test config
and stack config.
those function could build a frame of config read.
we will modify it after a few times.
Change-Id: I7d3ddc2c8af3043dc9cd89b519e506eca6a03514
Signed-off-by: liyin <liyin11@huawei.com>