Fix post_install.d for Fedora distribution

Reasons:
 - Fedora is not Ubuntu
 - Fedora uses 'yum' for software management

Changes:
 - renaming file '90-apt-get-update' to '90-yum-update'
 - swapping 'apt-get update' to 'yum update'

Change-Id: I212ab76ff6e302efcc955d26b7b1d978e4f204ca
Closes-Bug: #1371210