Allow ability to set security context for postgres deployment (#1517)

- Added docs for securityContext 
- enabled web securityContext configuration

Co-authored-by: Christian M. Adams <chadams@redhat.com>

roles/installer/defaults/main.yml

@@ -424,6 +424,7 @@ garbage_collect_secrets: false
 development_mode: false
 
 security_context_settings: {}
+postgres_security_context_settings: {}
 
 # Set no_log settings on certain tasks
 no_log: true

roles/installer/templates/deployments/task.yaml.j2

@@ -442,7 +442,7 @@ spec:
         fsGroup: 1000
 {% endif %}
 {% if security_context_settings|length %}
-        {{ security_context_settings | to_nice_yaml | indent(8) }}
+        {{ security_context_settings | to_nice_yaml | indent(10) }}
 {% endif %}
 {% endif %}
 {% if termination_grace_period_seconds is defined %}

roles/installer/templates/deployments/web.yaml.j2

@@ -340,6 +340,10 @@ spec:
 {% elif affinity %}
       affinity:
         {{ affinity | to_nice_yaml | indent(width=8) }}
+{% endif %}
+{% if security_context_settings|length %}
+      securityContext:
+        {{ security_context_settings | to_nice_yaml | indent(8) }}
 {% endif %}
       volumes:
         - name: "{{ ansible_operator_meta.name }}-receptor-ca"

roles/installer/templates/statefulsets/postgres.yaml.j2

@@ -51,6 +51,10 @@ spec:
         - image: '{{ _postgres_image }}'
           imagePullPolicy: '{{ image_pull_policy }}'
           name: postgres
+{% if postgres_security_context_settings|length %}
+          securityContext:
+            {{ postgres_security_context_settings | to_nice_yaml | indent(12) }}
+{% endif %}
 {% if postgres_extra_args %}
           args: {{ postgres_extra_args }}
 {% endif %}