HA demo: fix the pkill commands

They were not referencing the right process names.
Temporarily revert change that break HA deployment

https://github.com/crowbar/barclamp-provisioner/pull/351 breaks the
detection of availability of HAE repos when using the DEPS ISO.
Merge pull request #15 from vuntz/missing_hae

Temporarily revert change that break HA deployment
HA demo: be a bit more positive in the conclusion of the recovery :-)
Merge pull request #14 from vuntz/doc-fixes

Improve HA demo doc