Convert external CA chain to PKCS#7 before passing it to pkispawn.

https://fedorahosted.org/freeipa/ticket/4397

Reviewed-By: Petr Viktorin <pviktori@redhat.com>
User Life Cycle: create containers and scoping DS plugins

User Life Cycle is designed http://www.freeipa.org/page/V4/User_Life-Cycle_Management
It manages 3 containers (Staging, Active, Delete). At install/upgrade Delete and Staging
containers needs to be created.
		Active: cn=users,cn=accounts,$SUFFIX
		Delete: cn=deleted users,cn=accounts,cn=provisioning,$SUFFIX
		Stage:  cn=staged users ,cn=accounts,cn=provisioning,$SUFFIX

Plugins scopes:
		krbPrincipalName, krbCanonicalName, ipaUniqueID, uid:
			cn=accounts,SUFFIX
			cn=deleted users,cn=accounts,cn=provisioning,SUFFIX
		DNA:
			cn=accounts,SUFFIX

		Plugins exclude subtree:
		IPA UUID, Referential Integrity, memberOf:
			cn=provisioning,SUFFIX

https://fedorahosted.org/freeipa/ticket/3813

Reviewed-By: Petr Viktorin <pviktori@redhat.com>
Support delegating RBAC roles to service principals

https://fedorahosted.org/freeipa/ticket/3164