Add build_sphinx section in setup.cfg
Add build_sphinx section in setup.cfg

Change-Id: Ieac48a1a213bc5cd62a42dab1c74c80761e82fd1
Signed-off-by: Cédric Ollivier <d48310251a4a484d041bc5d09a9ac4d86d20f793@orange.com>

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