Upgrade Travis to Go 1.8 and use t.Name

As of Go 1.8, testing.T and testing.B have a Name method. Previously we have cut-and-paste the name of the test into strings, but this is error prone and has caused NDFs in the past. Going forward, we should use t.Name() in all new tests. I updated all existing tests except for those in the host package. I will add those as well if @DavidVorick does not think the changes will conflict too badly with the new storage manager code.