ci: increase DRATS dial timeout
ci: increase DRATS dial timeout

Addresses the following failure where the test wouldn't even start
because the authentication timed out immediately:

🐞```
STEP: creating new orgs and spaces
Setting api endpoint to api.caubeen.c2c.cf-app.com...
OK

api endpoint:   https://api.caubeen.c2c.cf-app.com
api version:    2.162.0
Not logged in. Use 'cf login' to log in.
API endpoint: https://api.caubeen.c2c.cf-app.com
Authenticating...
Post https://login.caubeen.c2c.cf-app.com/oauth/token: dial tcp: i/o timeout
FAILED
STEP: cleaning up the artifact
STEP: running the Cleanup step for cf-networking
STEP: cleaning up orgs and spaces
Not logged in. Use 'cf login' to log in.
FAILED
```

[#177321518](https://www.pivotaltracker.com/story/show/177321518)

cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release