add -T (temporary file prefix) flag to collate step

remove unneeded warn from test

data/vtlib/pib_reanalysis.json

@@ -104,6 +104,13 @@
 			"-l", {"subst":"pib_reanalysis_collate_compression","required":true,"ifnull":["0"]},
 			"--threads", {"subst":"pib_reanalysis_collate_threads","required":true,"ifnull":4},
 			{"subst":"pib_reanalysis_collate_extra_flags", "required":false},
+			{"subst":"pib_collate_tempfile_flag","ifnull":{
+								"subst_constructor":{
+									"vals":[
+										"-T",
+										{"subst":"pib_collate_tempfile_prefix","required":false, "ifnull":{"subst_constructor":{"vals":[ {"subst":"qc_check_id_run"}, {"subst":"s1_lane"}, "collate_tmp"], "postproc":{"op":"concat","pad":"_"}}}}
+									]
+								}}},
 			"-"
 		]
 	}

t/10-vtfp-vtfile_v2.t

@@ -10,7 +10,6 @@ use File::Temp qw(tempdir);
 use Cwd;
 
 my $tdir = tempdir(CLEANUP => 1);
-warn q[tdir: ], $tdir;
 
 my $odir = getcwd();
 my $test = Test::Cmd->new( prog => $odir.'/bin/vtfp.pl', workdir => q());