Allow LTI to be a child auth

[Robert Lyon]

Set a parent auth for LTI external app so that if a user logs in for the first time via LTI SSO they create a user in Mahara with parent auth as the main auth so the user can log in direct to mahara as well as via the LTI SSO

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/7766

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/7767

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/7798

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/7798
Committed: https://git.mahara.org/mahara/mahara/commit/826d97b482e98fe3e3c87969e7a82438bffa67dc
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 826d97b482e98fe3e3c87969e7a82438bffa67dc
Author: Robert Lyon <email address hidden>
Date: Thu Jun 1 15:25:24 2017 +1200

Bug 1691317: Allow SAML find user by email address

If there is only one user with email then it will link it up
automatically

Otherwise will allow user to choose

behatnotneeded

Change-Id: I98bdb3f3ade24dbed7326b4b5719d2b23c2e7e9c
Signed-off-by: Robert Lyon <email address hidden>

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/7767
Committed: https://git.mahara.org/mahara/mahara/commit/26ad944d4fabb65664d67939d9ee0e7271c47087
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 26ad944d4fabb65664d67939d9ee0e7271c47087
Author: Robert Lyon <email address hidden>
Date: Wed May 17 10:23:37 2017 +1200

Bug 1691317: Making the LTI SSO be a child of another auth

Choose via the Admin -> Webservices -> External apps menu

Sponsored by Teachers College, Columbia University

behatnotneeded

Change-Id: I4d90e60388d3dc958d3b102de503ff4057923744
Signed-off-by: Robert Lyon <email address hidden>