CC-4965: Fix airtime-silan import tool

-move to correct directory
CC-4965: Fix airtime-silan import tool

-various fixes
add airtime-silan to symlink to /usr/bin
CC-4965: Fix airtime-silan import tool

-prevent zombie processes
prevent creation of Zombie processes when running lsof
Merge branch '2.3.x' into 2.3.x-saas