Support map users and roles to multiple groups (#424)

* Support map users and roles to multiple groups

* Simplify code by rename `user_arn` to `userarn`, `role_arn` to `rolearn`

* Next version should be 6.x because PR this is a breaking change.

* Update example variables.tf

* Change indent to 2

* Fix map-aws-auth.yaml maybe invalid yaml.

templates/config-map-aws-auth-map_accounts.yaml.tpl

@@ -1 +0,0 @@
-    - "${account_number}"

templates/config-map-aws-auth-map_roles.yaml.tpl

@@ -1,4 +0,0 @@
-    - rolearn: ${role_arn}
-      username: ${username}
-      groups:
-        - ${group}

templates/config-map-aws-auth-map_users.yaml.tpl

@@ -1,4 +0,0 @@
-    - userarn: ${user_arn}
-      username: ${username}
-      groups:
-        - ${group}

templates/config-map-aws-auth.yaml.tpl

@@ -6,8 +6,14 @@ metadata:
 data:
   mapRoles: |
 ${worker_role_arn}
-${map_roles}
+  %{if chomp(map_roles) != "[]" }
+    ${indent(4, map_roles)}
+  %{ endif }
+  %{if chomp(map_users) != "[]" }
   mapUsers: |
-${map_users}
+    ${indent(4, map_users)}
+  %{ endif }
+  %{if chomp(map_accounts) != "[]" }
   mapAccounts: |
-${map_accounts}
+    ${indent(4, map_accounts)}
+  %{ endif }