(ipareplica role) fix versionlock release string

The versionlock is set for 5.el7.centos.6 but the currently installed
packages are 5.el7.centos.7. E.g.:

    [jhoblitt@ipa1 ~]$ rpm -qa | egrep ^ipa
    ipa-client-common-4.6.8-5.el7.centos.7.noarch
    ipa-server-4.6.8-5.el7.centos.7.x86_64
    ipa-client-4.6.8-5.el7.centos.7.x86_64
    ipa-server-common-4.6.8-5.el7.centos.7.noarch
    ipa-common-4.6.8-5.el7.centos.7.noarch

Author: jhoblitt

hieradata/role/ipareplica.yaml

@@ -43,7 +43,7 @@ profile::core::yum::versionlock:
   python2-ipaserver: &ipa_version
     ensure: "present"
     version: "4.6.8"
-    release: "5.el7.centos.6"
+    release: "5.el7.centos.7"
   ipa-client-common:
     <<: *ipa_version
   python2-ipaclient:

spec/hosts/roles/ipareplica_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 IPA_SERVER_VERSION = '4.6.8'
-IPA_SERVER_RELEASE = '5.el7.centos.6'
+IPA_SERVER_RELEASE = '5.el7.centos.7'
 
 role = 'ipareplica'