.travis.yml should use dev_setup.py install of duplicating the same functionality (#1044)
.travis.yml should use dev_setup.py install of duplicating the same functionality (#1044)

This means changes to dev_setup.py would reflect in CI straightaway.
samedder/azure-cli,QingChenmsft/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,QingChenmsft/azure-cli,yugangw-msft/azure-cli,QingChenmsft/azure-cli,samedder/azure-cli,samedder/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,samedder/azure-cli,QingChenmsft/azure-cli