Clean up XFAILed test cases

We had a set of test cases that have been incomplete and XFAILED. This patch
completes a couple of the interesting ones and removes the ones which seem
redundant or not sufficiently reduced to be useful.

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@211670 91177308-0d34-0410-b5e6-96231b3b80d8
test/ScopInfo: Remove %defaultOpts and list passes explicitly

Due to bad habit we sometimes used a variable %defaultOpts that listed
a set of passes commonly run to prepare for Polly. None of these test cases
actually needs special preparation and only two of them need the 'basicaa' to
be scheduled. Scheduling the required alias analysis explicitly makes the test
cases clearer.

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@211671 91177308-0d34-0410-b5e6-96231b3b80d8