util: make concatenate_string_array() reusable Reviewed-by: Pavel Březina <pbrezina@redhat.com>

utils: add get_last_x_chars() Reviewed-by: Pavel Březina <pbrezina@redhat.com>

sdap: properly handle binary objectGuid attribute Although in the initial processing SSSD treats the binary value right at some point it mainly assumes that it is a string. Depending on the value this might end up with the correct binary value stored in the cache but in most cases there will be only a broken entry in the cache. This patch converts the binary value into a string representation which is described in [MS-DTYP] and stores the result in the cache. Resolves https://fedorahosted.org/sssd/ticket/2588 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

UTIL: Add functions for replacing whitespaces. Reviewed-by: Pavel Reichl <preichl@redhat.com> Reviewed-by: Michal Židek <mzidek@redhat.com>

test_utils: Use common header file for libsss_util tests. Reviewed-by: Pavel Reichl <preichl@redhat.com> Reviewed-by: Michal Židek <mzidek@redhat.com>