ACRPull Workaround and Service Principle module fix

[ianphil]

All Submissions:

---

• [x] Have you followed the guidelines in our Contributing document?
• [x] Have you added an explanation of what your changes do and why you'd like us to include them?
• [x] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.
• [x] My code follows the code style of this project.
• [x] I ran lint checks locally prior to submission.
• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

What is the current behavior?

---

• Service Principle module creates SP with no password. Single SP supplied to module.
• Key Vault isn't updated with SP details.
• ACRPull uses Admin Creds

Issue Number: #207 #221

What is the new behavior?

---

Updates service principle module to create from a map data type. Template updates:

• Key Vault updated with Secrets for SP
• App Service App Setting updated with Key Vault supplied password of ACRPull SP

Does this introduce a breaking change?

---

• [no]

Any relevant logs, error output, etc?

---

(If it’s long, please paste to https://ghostbin.com/ and insert the link here.)

Other information

---