Fix bug 1571 - Keystone charm needs to pass CA SSL certificate

Change-Id: I7bce4fc0f4bc0d96b2bc7b84eff9eef655e8b098
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>

installers/charm/keystone/src/charm.py

@@ -343,6 +343,11 @@ class KeystoneCharm(CharmedOsmBase):
                     {"LDAP_GROUP_TREE_DN": config_ldap.ldap_group_tree_dn}
                 )
 
+            if config_ldap.ldap_tls_cacert_base64:
+                container_builder.add_envs(
+                    {"LDAP_TLS_CACERT_BASE64": config_ldap.ldap_tls_cacert_base64}
+                )
+
             if config_ldap.ldap_use_starttls:
                 container_builder.add_envs(
                     {