Disable a test if system too small

testsuite/expect/test1.100

@@ -51,6 +51,14 @@ if {[test_front_end] != 0} {
 	exit $exit_code
 }
 
+# find out if we have enough nodes to test functionality
+set partition [default_partition]
+set node_count [get_node_cnt_in_part $partition]
+if { $node_count < 2 } {
+	send_user "WARNING: Insufficient nodes in default partition ($node_count < 2)\n"
+	exit $exit_code
+}
+
 #
 # Test CPU count for sufficient number (test requires 3+ CPUs per node
 #