[Python-ideas] Make test.test_support an alias to test.support

[Serhiy Storchaka]

When backporting tests to 2.7 one of changes which you should do is 
change "support" to "test_support". Sometimes this is only a change.

I propose rename the test.test_support module to test.support (this will 
simplify backporting patches which changes the test.support module) and 
make test.test_support an alias to test.support. I.e. 
Lib/test/test_support.py should contains:

from test.support import *
from test.support import __all__