Ltr Site: status of ltr_client run checked through callback function

- file_not_empty deleted
- -d flag added in ltr_client

Change-Id: I1decefe4dbc3097025e0d85bd8a72d1ce0024419
Ltr Site: Autorefreshing logs added.

Change-Id: I28270d607b662ff81355277d61762cdd3b66f23a
LTR Site: Case-independent uniqueness checking of names in config added.

- Bugfix: fixed invalid objects trying to delete without creation
- Bugfix: non-field errors are shown now

Change-Id: If8247be234b7d55a00ca7b4e00999bb7870f74e3
Merge changes If8247be2,I28270d60,I1decefe4

* changes:
  LTR Site: Case-independent uniqueness checking of names in config added.
  Ltr Site: Autorefreshing logs added.
  Ltr Site: status of ltr_client run checked through callback function