IP allocation simulation - add LCP2 imbalance metric to node state output.

Print the LCP imbalance metric after the list of IPs.

To make this more sensible, but most of the printing logic into the
Node class.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 2e680e6b421d72cf2d217d3c3c1564da0bb19633)

ctdb/tests/takeover/ctdb_takeover.py

@@ -210,6 +210,13 @@ class Node(object):
         self.healthy = True
         self.imbalance = -1
 
+    def __str__(self):
+        return "%s %s%s" % \
+            ("*" if len(self.public_addresses) == 0 else \
+                 (" " if self.healthy else "#"),
+             sorted(list(self.current_addresses)),
+             " %d" % self.imbalance if options.lcp2 else "")
+
     def can_node_serve_ip(self, ip):
         return ip in self.public_addresses
 
@@ -249,12 +256,8 @@ class Cluster(object):
         self.prev = None
 
     def __str__(self):
-        return "\n".join(["%2d %s %s" %
-                          (i,
-                           "*" if len(n.public_addresses) == 0 else \
-                               (" " if n.healthy else "#"),
-                           sorted(list(n.current_addresses)))
-                          for (i, n) in enumerate(self.nodes)])
+        return "\n".join(["%2d %s" % (i, n) \
+                              for (i, n) in enumerate(self.nodes)])
 
     # This is naive.  It assumes that IP groups are indicated by the
     # 1st node having IP groups.