Add security manager subsystem tests coverage

[zhantemirov]

Jira: EAPQE-83 Berg issue: #9

Security Manager subsystem page contains "minimum permissions" and "maximum permissions" vertical navigation items, expecting two spec files to be created.

Resources to cover (from /subsystem=securitymanager:read-resource(recursive=true)):

• [X] /subsystem=security-manager/deployment-permissions=default/minimum-permissions
• [X] /subsystem=security-manager/deployment-permissions=default/minimum-permissions/actions
• [X] /subsystem=security-manager/deployment-permissions=default/minimum-permissions/class
• [X] /subsystem=security-manager/deployment-permissions=default/minimum-permissions/module
• [X] /subsystem=security-manager/deployment-permissions=default/minimum-permissions/name
• [X] /subsystem=security-manager/deployment-permissions=default/maximum-permissions
• [X] /subsystem=security-manager/deployment-permissions=default/maximum-permissions/actions
• [X] /subsystem=security-manager/deployment-permissions=default/maximum-permissions/class
• [X] /subsystem=security-manager/deployment-permissions=default/maximum-permissions/module
• [X] /subsystem=security-manager/deployment-permissions=default/maximum-permissions/name

[OndrejKotek]

@zhantemirov Could you add also other tests implemented in hal/testsuite.next please? See https://github.com/hal/testsuite.next/blob/master/tests-configuration-securitymanager/src/test/java/org/jboss/hal/testsuite/test/configuration/security_manager/SecurityManagerTest.java

[zhantemirov]

@OndrejKotek sure, didn't know about that. I'll come back with more tests later.