Create cross namespace secrets (#1490)

* Create cross namespace secrets

* add test cases

* fixes

* Fixes
- include namespace in secret name only when namespace is provided
- use username.namespace as key to pgUsers only when namespace is
  provided
- avoid conflict in the role creation in db by checking namespace
  alongwith the username

* Update unit tests

* Fix test case

* Fixes

- update regular expression for usernames
- add test to allow check for valid usernames
- create pg roles with namespace (if any) appended in rolename

* add more test cases for valid usernames

* update docs

* fixes as per review comments

* update e2e

* fixes

* Add toggle to allow namespaced secrets

* update docs

* comment update

* Update e2e/tests/test_e2e.py

* few minor fixes

* fix unit tests

* fix e2e

* fix e2e attempt 2

* fix e2e

Co-authored-by: Rafia Sabih <rafia.sabih@zalando.de>
Co-authored-by: Felix Kunde <felix-kunde@gmx.de>

pkg/spec/types.go

@@ -49,6 +49,7 @@ const (
 type PgUser struct {
 	Origin     RoleOrigin        `yaml:"-"`
 	Name       string            `yaml:"-"`
+	Namespace  string            `yaml:"-"`
 	Password   string            `yaml:"-"`
 	Flags      []string          `yaml:"user_flags"`
 	MemberOf   []string          `yaml:"inrole"`