Disable the new failing test.

According to https://github.com/cyrusimap/cyrus-imapd/issues/2332, this
isn't a bug in cyrus and so that test is expected to fail at the moment.
A fix may require an update to perl-Net-CalDAVTalk.

cyrus-imapd.spec

@@ -463,6 +463,12 @@ tests=(
     # These are newly (20180411) added tests which don't seem to work against
     # the 3.0.5 codebase.  https://github.com/cyrusimap/cassandane/issues/54
     Sieve.rfc5490_mailboxexists_variables # This one is actually a Cyrus bug
+
+    # This fails beginning with 3.0.6 due to a bug in Net::CalDAVTalk.  The
+    # issue is related to the removal of JMAP support; CalDAVTalk checks for a
+    # jmap-specific thing which is no longer present.
+    # https://github.com/cyrusimap/cyrus-imapd/issues/2332
+    Caldav.supports_event
 )
 for i in ${tests[@]}; do exclude+=("!$i"); done
 
@@ -613,9 +619,11 @@ getent passwd cyrus >/dev/null || /usr/sbin/useradd -c "Cyrus IMAP Server" -d /v
 
 
 %changelog
-* Mon Apr 30 2018 Jason L Tibbitts III <tibbs@math.uh.edu> - 3.0.6-1
+* Tue May 01 2018 Jason L Tibbitts III <tibbs@math.uh.edu> - 3.0.6-1
 - Update to 3.0.6.
 - Remove upstreamed patches and renumber the rest.
+- Disable one new failing test:
+  https://github.com/cyrusimap/cyrus-imapd/issues/2332
 
 * Mon Apr 30 2018 Pete Walter <pwalter@fedoraproject.org> - 3.0.5-15
 - Rebuild for ICU 61.1