runWorker_path is now a JSON Config option, allowing meadow type/name -specific values

hive_config.json

@@ -7,6 +7,9 @@
         "SubmitWorkersMax"  : 50
     },
     "Meadow" : {
+        "REMARKS" : {
+            "RunWorkerPath" : "The path of runWorker.pl . When null or missing, beekeeper will use $EHIVE_ROOT_DIR or its own path. When RunWorkerPath is '', beekeeper assumes runWorker.pl is in $PATH"
+        },
         "CleanupTempDirectoryKilledWorkers" : 0,
         "MaxLimboSeconds"                   : 10,
         "MaxRegistrationSeconds"            : 30,

modules/Bio/EnsEMBL/Hive/Meadow.pm

@@ -190,10 +190,21 @@ sub pipeline_name {
 }
 
 
-sub runWorker_path {    # FIXME: can be made dependent on config options
+=head2 runWorker_path
+
+    Title   :  runWorker_path
+    Function:  Getter for the path to runWorker.pl
+               This is now set in the JSON config file. When missing or set to null,
+               defaults to $EHIVE_ROOT_DIR/scripts
+
+=cut
+
+sub runWorker_path {
     my $self = shift @_;
 
-    return $ENV{'EHIVE_ROOT_DIR'}.'/scripts/';
+    my $path = $self->config_get('RunWorkerPath') // $ENV{'EHIVE_ROOT_DIR'}.'/scripts/';
+    $path = $path . '/' unless $path =~ /\/$/;
+    return $path;
 }