Removing an unnecessary 'BaseSharesAltTest' class

I don't see the need for a base class only for alt user.
We have already 'BaseSharesTest' class that initializes
'primary' user with the same role as 'alt' user.
If 'alt' user is necessary it can be initialzed at the test
class level.

Change-Id: Ie980a130c1996e0e97de25218fedd509cead4afb
1 file changed