Adding security_context flag to charms

security_context is set to false while we don't have new
container images.

Change-Id: I99cf8c1ab7446811887445d596f416f7e79574e7
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>
diff --git a/installers/charm/pla/config.yaml b/installers/charm/pla/config.yaml
index 75b19d8..642c165 100644
--- a/installers/charm/pla/config.yaml
+++ b/installers/charm/pla/config.yaml
@@ -33,3 +33,7 @@
       ImagePullPolicy configuration for the pod.
       Possible values: always, ifnotpresent, never
     default: always
+  security_context:
+    description: Enables the security context of the pods
+    type: boolean
+    default: false