added installation for edge sso

tasks/main.yml

diff --git a/tasks/main.yml b/tasks/main.yml
index eeec27b..a2c7943 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -14,6 +14,11 @@
     state: touch
     path: "{{ edge_sso_installation_config_file }}"
 
+- name: Assert that availability of SAML IDP metadata file
+  assert:
+    that:
+    - "edge_sso_saml_idp_metadata_url is defined"
+
 - name: Construct the Edge SSO Installation config file file
   become: yes
   template: