Description of problem:
When the hoseted-engine --deploy fails on RHEV-H the second attempt to configure the hosted engine always fails with the following ERROR:

2016-02-10 10:40:55 DEBUG otopi.plugins.ovirt_hosted_engine_setup.pki.vdsmpki plugin.execute:932 execute-output: ('/bin/openssl', 'x50
9', '-noout', '-text', '-in', '/etc/pki/vdsm/libvirt-spice/server-cert.pem') stdout:


2016-02-10 10:40:55 DEBUG otopi.plugins.ovirt_hosted_engine_setup.pki.vdsmpki plugin.execute:937 execute-output: ('/bin/openssl', 'x50
9', '-noout', '-text', '-in', '/etc/pki/vdsm/libvirt-spice/server-cert.pem') stderr:
unable to load certificate
140287306053536:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: TRUSTED CERTIFICATE

2016-02-10 10:40:55 DEBUG otopi.context context._executeMethod:152 method exception
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 142, in _executeMethod
  File "/usr/share/ovirt-hosted-engine-setup/plugins/ovirt-hosted-engine-setup/pki/vdsmpki.py", line 281, in _late_setup
  File "/usr/share/ovirt-hosted-engine-setup/plugins/ovirt-hosted-engine-setup/pki/vdsmpki.py", line 126, in _getSPICEcerts
  File "/usr/lib/python2.7/site-packages/otopi/plugin.py", line 942, in execute
RuntimeError: Command '/bin/openssl' failed to execute


Version-Release number of selected component (if applicable):

ovirt-node-plugin-hosted-engine-0.2.0-18.0.el7ev.noarch
ovirt-hosted-engine-setup-1.2.6.1-1.el7ev.noarch

How reproducible:
depends on the timing

Steps to Reproduce:
1.Start the deploy 
2.Interrupted the deployment by Ctrl+c combination.

Actual results:
The ERROR above

Expected results:
hosted engine does a proper cleaning before it starts or when it is interrupted.

Additional info:
issue is caused by existing file
     /etc/pki/vdsm/libvirt-spice/server-cert.pem
which is empty. When the file is removed, the deployment can be started again.