Fix error message for invalid conduit mapping

Print the name of the problematic network, instead of the Ruby Object.
Merge pull request #294 from rhafer/errmessage

Fix error message for invalid conduit mapping
fixup! Fix error message for invalid conduit mapping
Merge pull request #295 from SUSE-Cloud/master

fixup! Fix error message for invalid conduit mapping
Add optional crowbar-applied boolean attribute to schema

We add a crowbar applied attribute to mark the proposal as applied after
the chef run. This allows the UI to show that the current form of the
proposal has been 'applied' successfully (i.e. chef-client completed the
run w/ success) and that the proposal was not modified after that.

Update the proposal_schema_revision, so we can add the attribute to
schema for ('3rd party') barclamps that currently do not have it.

Refs: crowbar/crowbar#2044 (which adds this attribute to barclamps which
lack it), crowbar/barclamp-crowbar#1068 (which marks the proposals as
applied) and https://bugzilla.novell.com/show_bug.cgi?id=877486
Merge pull request #296 from bkutil/add_applied_attribute

Add optional crowbar-applied boolean attribute to schema
add travis testing support
Merge pull request #298 from rhafer/travis

add travis testing support