(FACT-629) Never use proxy for ec2 fact retrieval
Merge pull request #736 from alexjurkiewicz/ec2_proxy

(FACT-629) ec2 fact retrieval should not use proxy
(FACT-637) Add lsbminordistrelease fact

This fact gives the minor version of the distro as derived from
lsbdistrelease and is confined to the kernel value of Linux or
GNU/kFreeBSD. Given lsbdistrelease of X.Y or X.Y.Z it will return Y. If
no minor version is present, the fact will not exist.
(FACT-637) Add lsbminordistrelease to facter schema