Bug 24883: Move new sub from load_yaml.pl

Bug 24883: Move new sub from load_yaml.pl

Use the sub from C4::Installer to avoid dup of code.

Note:
We are going to modify the script and so will do more stuffs.
We may want to rename it, maybe installer_utilities.pl,
misc/installer/yaml_utility.pl, any suggestions?

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>