Add /usr/local/bin to the end of the default path

this was initially removed as it resulted in programs in /etc/profile.d searching /usr/local/bin, which if the NFS server had hung resulted in ec2-user not being able to log in subsequently verified that it seems safe to add it to the end of the path, obviously subject to not having anything called from profile that exists in /usr/local

Reassigned to @ctan0003

Status changed to merged

mentioned in commit 03561687

mentioned in commit 5faeba7e