Don't store LTI_OAUTH_SETTINGS during module load so that functional tests can...

Don't store LTI_OAUTH_SETTINGS during module load so that functional tests can override settings on each tests run - the auth_lti backend is imported once as an AUTHENTICATION_BACKEND during project load so storing the settings at the top of the module prevents overriding of this setting during authentication.  Up version to 1.0 (current Github release is at 0.9, so this is another minor bump).