Bug 1061284 - Fix resultset ISE
Merge pull request #201 from mozilla/fix-resultset-ISE

Bug 1061284 - Fix resultset ISE
fix bug 1059222 - refresh flat_exclusions on save
Bug 1062228 - Set re.IGNORECASE correctly for the build_type regex

Only the re module function .search() accepts the flags argument, for
the regexobject search() method it actually gets interpreted as the
'pos' parameter, since |re.IGNORECASE == 2|.

With this change we now correctly identify tests run on ASAN builds as
buildtype 'asan'.