These tests aren't included in the top level test script so have
unintentionally been ignored and currently don't compile. Until
this is fixed (see #257) add a build tag so tools ignore them.
This commit moves the user.Manage to its own package (user/manager)
so it can import the connector package in a later commit.
For clarity, it renames "Manager" to "UserManager" using gorname.
This commit has no functional changes.
