Created attachment 1152881 [details]
attempt1

Description of problem:
Re-install host failed with General command validation failure. 

It's not possible to re-install a host in cluster 4.0 after failing in the first time, because of a compatibility issues. 
 
Version-Release number of selected component (if applicable):
4.0.0-0.0.master.20160423161403.gite38df80.el7.centos

How reproducible:
100

Steps to Reproduce:
1. Try to install host(vdsm 3.6.z) in cluster 4.0 and fail with:
"Host orchid-vds2.qa.lab.tlv.redhat.com is compatible with versions (3.4,3.5,3.6) and cannot join Cluster CL1 which is set to version 4.0"
2. Put host to maintenance and update vdsm to 4.0 on host
3. Try to re-install the host

Actual results:
Re-install host failed with General command validation failure -->

Error while executing action: 

orchid-vds2.qa.lab.tlv.redhat.com:
General command validation failure.

Expected results:
Re-install should work

Additional info:
Removing the server and then installing it works