changed cluster info from CharField to TextField
changed cluster info from CharField to TextField

pkoro/okeanos-LoD,themiszamani/okeanos-LoD,grnet/okeanos-LoD,stevelaskaridis/okeanos-LoD,stevelaskaridis/okeanos-LoD,themiszamani/okeanos-LoD,pkoro/okeanos-LoD,grnet/okeanos-LoD,themiszamani/okeanos-LoD,themiszamani/okeanos-LoD,grnet/okeanos-LoD,grnet/okeanos-LoD,pkoro/okeanos-LoD,stevelaskaridis/okeanos-LoD,stevelaskaridis/okeanos-LoD,pkoro/okeanos-LoD