BACKLOG-1349 Improved destroying session cookie
BACKLOG-1349 Session is now only unset when it still exists
Merge branch 'master' into feature/BACKLOG-1349

* master: (137 commits)
  Composer update
  Minor typo fix
  Intitialize feedbackInfo before using it (in UnknownIssuer and UnknownSP). Fixes #12.
  Fixes SE-21: Removed unused, broken and dangerous setUri on Discovery js.
  Bugfix: Input filtering should use Response by reference because otherwise changed to substructures like attributes will be done by-value instead of by-reference.
  Bugfix: Revert AuthenticatingAuthority back to old behaviour, with surprising consequence that AA of EB gets added in VO mode
  Bugfix: SPNameQualifier was not set EPPN.
  Fixed AuthenticatingAuthorities... again
  Temporary switch to personal fork of simplesamlphp to be able to use newer saml2 library version
  Upgraded TestDiContainer to Pimple 2.0
  Prefer source for composer installs to get around GitHubs API rate limit
  Clean install to force composer to see OpenConext-engineblock-fixtures move
  OpenConext-engineblock-fixtures have been moved to OpenConext/OpenConext-engineblock-fixtures
  Bugfix: also pass along the AuthnContextClassRef, AuthnContextDecl and AuthnContextDeclRef.
  Bugfix: Pimple 2.0 uses shared functions by default.
  Upgraded and alphabetized dependencies.
  Refactor: Use 'use' statement to import IdFrame from namespace, for cleaner references to it.
  Bugfix: Assertion should be Issued bij EB unless Transparent mode is used.
  Bugfix: Setting subjectId in attribute Manipulations now works again.
  Upgraded composer to handle PSR-4 autoloading
  ...
Merge pull request #17 from OpenConext/feature/BACKLOG-1349

Feature/backlog 1349