Fix suppressions for jUnit reports.

When creating jUnit report, first remove prefixes, then apply
suppressions. Otherwise, the suppressions may not match.

Fix logic for reading suppressions file -- it was reading just the
comments. Also, append a message to system-out for suppressed tests stating
that test was suppressed.
Merge pull request #1069 from thomasvandoren/fix-junit-converter

Fix suppressions for jUnit reports.

When creating jUnit report, first remove prefixes, then apply
suppressions. Otherwise, the suppressions may not match.

Fix logic for reading suppressions file -- it was reading just the
comments. Also, append a message to system-out for suppressed tests stating
that test was suppressed.