Exclude Cassandane on BE machines as well.

cyrus-imapd.spec

@@ -403,8 +403,6 @@ find %buildroot -name ".packlist" -exec rm {} \;
 # https://github.com/cyrusimap/cyrus-imapd/issues/1993
 %ifnarch s390x ppc64
 make %{?_smp_mflags} check || exit 1
-%endif
-
 
 %if %{with cassandane} && %__isa_bits == 64
 # Run the Cassandane test suite.  This will exhaustively test the various
@@ -487,6 +485,7 @@ export CYRUS_USER=$USER
     2>&1
 
 %endif
+%endif
 
 
 %pre