Correct time specification (should be a closure)

Author: viklund

config/standard.config

@@ -10,14 +10,14 @@ process {
     time = params.runtime.simple
 
     $manta {
-        time = params.runtime.caller * 2 **(task.attempt-1)
+        time = { params.runtime.caller * 2 **(task.attempt-1) }
     }
 
     $create_fastq {
         time = params.runtime.caller
     }
 
     $fermikit {
-        time = params.runtime.fermikit * 2**( task.attempt -1 )
+        time = { params.runtime.fermikit * 2**( task.attempt -1 ) }
     }
 }