Add crowbar-status and crowbar-failed in schema

Otherwise, barclamp_mgmt_lib.rb will edit the schema and add them, which
will make the files differ from the ones in the package.

Part of https://bugzilla.novell.com/show_bug.cgi?id=776583
Set proposal_schema_version to 2 in crowbar.yml

This is needed when we have crowbar-status/crowbar-failed in the schema.
Use /var/log/crowbar/sledgehammer instead of /install-logs

Be a good citizen and put logs where they belong too.
Merge pull request #61 from vuntz/add-missing-attributes

Add crowbar-status and crowbar-failed in schema [1/18]
Merge pull request #63 from vuntz/install-logs

https://github.com/crowbar/barclamp-logging/pull/63

Merged by devtool for cloudsleuth