Add simple checkAccess method for SAML SPs

Add the same checkAccess method to SAML SPs, like in OIDC. Will only work for SPs which have no service connected.

changed milestone to %2.8.1

added enhancement label

assigned to @michael.simon

created branch feature/ISSUE-209_add-simple-checkaccess-method-for-saml-sps to address this issue

mentioned in merge request !86 (merged)

mentioned in commit 5926c946

closed with merge request !86 (merged)