composer: preserve local env variable in wrapper script

when we redefine LD_LIBRARY_PATH PATH etc we need to append the orginal
values e.g. $LD_LIBRARY_PATH
composer: get_package_from_dep accept a list of string as input

not just a string
composer: when searching library in the yum repo accept also partial match

when looking for a shared library into the yum repo we match also if only
one of the file/links match