ctdb-tests: Define generic setup() function

Create default setup() function that aborts.  This function will be
redefined by each support script and used to do the setup.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

ctdb/tests/eventscripts/scripts/local.sh

@@ -447,6 +447,14 @@ EOF
 
 # Result and test functions
 
+
+############################################################
+
+setup ()
+{
+	die "setup() is not defined"
+}
+
 # Set some globals and print the summary.
 define_test ()
 {