upgrade net-ssh from 2.6.5 to 2.9.1
EmsRefresh of Amazon Images for EBS only instances

https://bugzilla.redhat.com/show_bug.cgi?id=1139383

This is the first part of the ticket, it pertains to storing the
block_storage_based_only for flavors and root_device_type for images.
Once this data is filled in by the ems_refresh we will be able to
filter out invalid instance types during provisioning.
Merge pull request #550 from kbrock/gem_net_ssh

upgrade net-ssh from 2.6.5 to 2.9.1
Merge pull request #543 from mkanoor/bugzilla_1139383

EmsRefresh of Amazon Images for EBS only instances
Merge branch 'master' of https://github.com/ManageIQ/manageiq into erb2haml