Show some Cluster fields depending on bootstraped flag

Now the UI is more or less done for this
Added some devel doc

+ Set a string to an Internal exception
Menu integration done

Cluster initial configuration UI working
Give the basis for leave cluster request
Change iface now works in a single node cluster
Include cluster name in the clusterConfiguration

Give a default value to logical cluster name
added upstart script for the PSGI

(this is temporary if properly integrated with nginx or whatever)
Manage another daemon (PSGI one)

And restart ha works again
Join to an existing cluster starts to work

Some TODOs are in the pipe
Show real configured cluster name
Store the nodeid for cluster membership in NodeList
Added /etc/default/corosync to conf

* Write the used files
Include nodeid in configuration

Show different help messages depending on the bootstraped value
Added node method to NodeList class

* Plus fixing unit tests
addNode and deleteNode callbacks now are working nicely

Left to notify to other members of the cluster
Adding missing stub
Migrate rs_verify_servers in remoteservices.conf

To rest_verify_servers core.conf configuration key
Verify hostnames in RESTClient based on constructor param
Merge branch 'ejhernandez/ha-base-multi-node' into jacalvo/ha-confrepl

Conflicts:
	main/core/ChangeLog
	main/ha/src/EBox/HA.pm