Revert "Revert "Extend testing timeout to 15 mins""
Revert "Revert "Extend testing timeout to 15 mins""

This reverts commit e96fdce000fe61289ad257b1da83eab3a71fd46d.

[#170711122](https://www.pivotaltracker.com/story/show/170711122)

cloudfoundry/cf-deployment,cloudfoundry/cf-deployment