Cert check playbooks: remove become

The container doesn't have sudo, so become should be set in the
inventory if necessary

playbooks/openshift-checks/certificate_expiry/easy-mode.yaml

@@ -8,7 +8,6 @@
 
 - name: Check cert expirys
   hosts: nodes:masters:etcd
-  become: yes
   gather_facts: no
   vars:
     openshift_certificate_expiry_save_json_results: yes

playbooks/openshift-checks/certificate_expiry/html_and_json_default_paths.yaml

@@ -3,7 +3,6 @@
 
 - name: Check cert expirys
   hosts: nodes:masters:etcd
-  become: yes
   gather_facts: no
   vars:
     openshift_certificate_expiry_generate_html_report: yes

playbooks/openshift-checks/certificate_expiry/html_and_json_timestamp.yaml

@@ -3,7 +3,6 @@
 
 - name: Check cert expirys
   hosts: nodes:masters:etcd
-  become: yes
   gather_facts: no
   vars:
     openshift_certificate_expiry_generate_html_report: yes

playbooks/openshift-checks/certificate_expiry/longer-warning-period-json-results.yaml

@@ -4,7 +4,6 @@
 
 - name: Check cert expirys
   hosts: nodes:masters:etcd
-  become: yes
   gather_facts: no
   vars:
     openshift_certificate_expiry_warning_days: 1500

playbooks/openshift-checks/certificate_expiry/longer_warning_period.yaml

@@ -4,7 +4,6 @@
 
 - name: Check cert expirys
   hosts: nodes:masters:etcd
-  become: yes
   gather_facts: no
   vars:
     openshift_certificate_expiry_warning_days: 1500