tests: Add a test for group resolution with ldap_group_nesting_level=0 Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

TESTS: Adding intg. tests on nested groups Resolves: https://fedorahosted.org/sssd/ticket/2940 Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

intg: Test extra attributes duplicate Regresion test for ticket #3120 Resolves: https://fedorahosted.org/sssd/ticket/3120 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

test_ldap: test resolving of names with special characters Integration test for #3121 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

test_ldap: test nested membership with rfc2307bis Integration test for #3093 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

intg: create ldap test without enumeration Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>