Fix concurrency issue in security-service tempest test

Tempest test 'test_list_security_services_detailed_filter_by_ss_attributes'
is used by two modules:
  tempest.api.share.test_security_services
  tempest.api.share.admin.test_security_services.

And when both of them are running at a time, they interfere with each other.
That causes mismatch error - we expect 1 security service to be listed,
but get 2.

Remove check if length of returned list is equals to 1.

Add check if all returned security services satisfy filtering opts.

Change-Id: Ia78549209f38a8272743b1edfd2172a53ef59197
Closes-bug: #1386619
Merge "Fix concurrency issue in security-service tempest test"