Relax the test for inappropriate fallback

Since we don't have a specific exception type for the SCSV inappropriate
fallback cipher being used, we relied on scanning the cause message.
BoringSSL has the error message of "INAPPROPRIATE_FALLBACK" which
doesn't match the OpenSSL error message of "inappropriate fallback" so
we need to relax the test a bit to accept both.

This should be fine as we're just using the message as a proxy to
determine whether the correct thing is done and not really trying to
enforce a specific exception message.

Bug: 21211765
Change-Id: I4e7cd5486c0eb8ab3e3f9b64b4e7234436ec4ee0
1 file changed