XNAT 1.8.0 support

[aswinnarayanan]

Was testing out the plugin on our test XNAT 1.8.0.1 instance.

There's some errors with accessing Subjects using an AAF user.
Same error occurs even when logging in with the AAF_user's localdb password.

restleg and sql logs are showing that database is finding a duplicate relation.

ERROR org.nrg.xnat.restlet.resources.search.SearchResource - Failed POST
org.postgresql.util.PSQLException: ERROR: relation "_PROJECTNAME_xnat_col_subjectdata_AAFUSERNAME" already exists

(PROJECTNAME and AAFUSERNAME are redacted)

AAF user can access the Subject itself via a direct link.
But the Subject query from the Projects page is failing

[markendr]

PR merged by upstream. Fixed in https://bitbucket.org/xnatx/openid-auth-plugin/commits/ccdbacda4a9350f9ca84bc6462d1bd986b0aa0b4

Tested okay on UQ UAT and Prod XNAT instances