spec: require ansible 2.5.2
spec: require ansible 2.5.2

Require ansible 2.5.2 since it includes a fix
for ovirt_storage_domains module

Change-Id: Icb690f3cab108a06785d376c1cd9576865739c77
Bug-Url: https://bugzilla.redhat.com/1571467
Signed-off-by: Simone Tiraboschi <cb03129c66ba4da7ba7044049d0f43907bf857bb@redhat.com>

oVirt/ovirt-hosted-engine-setup,oVirt/ovirt-hosted-engine-setup