add .gitignore
add .gitignore

Change-Id: I0f9163ed89cdf0fd5e29a2eea50b503a8e576d0b
Signed-off-by: Ryota MIBU <2a020678b95ddf14a5db916807d3fb3b65997655@cq.jp.nec.com>

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