[midPoint-git] [Evolveum/midpoint] 032719: Re-add default Item.add method

[mederly]

  Branch: refs/heads/master
  Home:   https://github.com/Evolveum/midpoint
  Commit: 0327196701336181409d5755c464c8e2b6a7bd98
      https://github.com/Evolveum/midpoint/commit/0327196701336181409d5755c464c8e2b6a7bd98
  Author: Pavol Mederly <mederly at evolveum.com>
  Date:   2020-02-27 (Thu, 27 Feb 2020)

  Changed paths:
    M gui/admin-gui/src/test/java/com/evolveum/midpoint/web/TestIntegrationSecurity.java
    A gui/admin-gui/src/test/resources/security/role-authorization-1.xml
    A gui/admin-gui/src/test/resources/security/role-authorization-2.xml
    M infra/prism-api/src/main/java/com/evolveum/midpoint/prism/Item.java
    M infra/prism-impl/src/main/java/com/evolveum/midpoint/prism/impl/ItemImpl.java
    M infra/schema/src/main/resources/xml/ns/public/common/common-core-3.xsd
    M model/model-impl/src/main/java/com/evolveum/midpoint/model/impl/security/GuiProfileCompiler.java

  Log Message:
  -----------
  Re-add default Item.add method

...and fix MID-5002 the correct way. Also added a test related to the
original scenario described in that issue to make sure it passes.