add server-eshell command to launch erlang remsh

Change-Id: Icafbbca08b938d5b70566bbfd8977f5994d256a7
Reviewed-on: http://review.membase.org/5402
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

info.py

@@ -9,6 +9,8 @@
 
 import restclient
 import simplejson
+import subprocess
+import sys
 
 class Info:
     def __init__(self):
@@ -31,5 +33,8 @@ def runCmd(self, cmd, server, port,
         for x in ['license', 'licenseValid', 'licenseValidUntil']:
             if x in json:
                 del(json[x])
-
-        print simplejson.dumps(json, sort_keys=True, indent=2)
+        if cmd == 'server-eshell':
+            p = subprocess.call(['erl','-name','ctl@127.0.0.1',
+                '-setcookie',json['otpCookie'],'-hidden','-remsh',json['otpNode']])
+        else:
+            print simplejson.dumps(json, sort_keys=True, indent=2)

membase

@@ -67,6 +67,7 @@ def main():
     commands = {
         'server-list'       : listservers.ListServers,
         'server-info'       : info.Info,
+        'server-eshell'     : info.Info,
         'server-add'        : node.Node,
         'server-readd'      : node.Node,
         'rebalance'         : node.Node,