[AU] Add support for Metadata Management

[thiloshon]

Description: Dataholder should configure the following once ACCC creates its status endpoints in IS openbanking.xml.

Tasklist:

• A diagram to explain the usage Use the following and come up with the complete diagram

  • https://docs.google.com/presentation/d/1CUZtgdPq376gR1eyIYmye7AtzuZecYWzbGgGyoimEV4/edit#slide=id.g6f1d1af2c4_0_348
  • https://lh3.googleusercontent.com/-M_zvlBg4olY/Xm8fvmBNZMI/AAAAAAAAETU/-utIqXkZawQ8Po_d2gLHtqbR9telLm8SQCK8BGAsYHg/s0/2020-03-15.jpg
  • https://lh3.googleusercontent.com/-AoHzm7Lzmag/Xm8kBWqEUlI/AAAAAAAAEUE/1gMuzEq85swCszYJoVW0AxjkvddDiL41QCK8BGAsYHg/s0/2020-03-16.jpg

• Brief description and a new page for $subject

Suggested Labels: 150, AU

[isharailanga]

Content is available in the https://docs.wso2.com/display/OB150/Configuring+the+Open-Banking.xml+File+for+AU page. A new page for the feature is required.

[isharailanga]

Doc link for $subject: https://docs.wso2.com/display/OB150/Metadata+Cache+Management

[isharailanga]

Attached the updated diagram and the doc is complete now.