revised fastqcreen

tasks/fastqc.wdl

 	File read1
 	File read2
 	String docker
-	String cluster_config
+	String docker
+	String cluster
 	String disk_size
 
 	command <<<
 
 	runtime {
 		docker:docker
-    	cluster: cluster_config
+    	cluster: cluster
     	systemDisk: "cloud_ssd 40"
     	dataDisk: "cloud_ssd " + disk_size + " /cromwell_root/"
 	}

tasks/fastqscreen.wdl

 	String read1name = basename(read1,".fastq.gz")
 	String read2name = basename(read2,".fastq.gz")
 	String docker
-	String cluster_config
+	String cluster
 	String disk_size
 
 	command <<<
 
 	runtime {
 		docker:docker
-    	cluster: cluster_config
+    	cluster: cluster
     	systemDisk: "cloud_ssd 40"
     	dataDisk: "cloud_ssd " + disk_size + " /cromwell_root/"
 	}