duplicityBackup: A service where the "path [...] either does not exists or is not readable: cannot backup" error occurs is stated as "OK" (backuped)

[C-Duv]

The script test if path to backup exists and are readable: if not an error is reported.

A service where at least one path could not be backup because the path doesn't exists or is not readable should be reported as failed.

During a test I got:

[MSG] 2014-10-03 15:29:51 UTC - --------------------------------------------------------------------------------
[MSG] 2014-10-03 15:29:51 UTC - - Backup File System service "localDisk"
[MSG] 2014-10-03 15:29:51 UTC - ----------

[DEBUG] 2014-10-03 15:29:51 UTC - --- backupFs("localDisk") ---
[DEBUG] 2014-10-03 15:29:51 UTC - List of path to backup
[DEBUG] 2014-10-03 15:29:51 UTC - --- backupPath("localDisk", "/tmp/test-duplicity/fake-fs/etc") ---
[ERROR] 2014-10-03 15:29:51 UTC - Path to backup "/tmp/test-duplicity/fake-fs/etc" either does not exists or is not readable: cannot backup;
[DEBUG] 2014-10-03 15:29:51 UTC - --- backupPath("localDisk", "/tmp/test-duplicity/fake-fs/root/") ---
[ERROR] 2014-10-03 15:29:51 UTC - Path to backup "/tmp/test-duplicity/fake-fs/root" either does not exists or is not readable: cannot backup;
[DEBUG] 2014-10-03 15:29:51 UTC - --- backupPath("localDisk", "/tmp/test-duplicity/fake-fs/var/www") ---
[ERROR] 2014-10-03 15:29:51 UTC - Path to backup "/tmp/test-duplicity/fake-fs/var/www" either does not exists or is not readable: cannot backup;
[DEBUG] 2014-10-03 15:29:51 UTC - --- /backupFs("localDisk") ---

[MSG] 2014-10-03 15:29:51 UTC - Backup File System service "localDisk": OK
[MSG] 2014-10-03 15:29:51 UTC - --------------------------------------------------------------------------------

Service "localDisk" should not be "OK".

[C-Duv]

6781ae1 should correct this.