Fix bug: processSomatic input

tasks/processSomatic.wdl

@@ -6,7 +6,7 @@ task processSomatic {
     
 	File ref_dir
     String fasta
-    String varscan_docker
+    String docker
     String cluster_config
     String disk_size
 
@@ -14,7 +14,7 @@ task processSomatic {
 		java -Xmx12g -jar /opt/VarScan.v2.4.3.jar processSomatic ${varscan_snp}
 		java -Xmx12g -jar /opt/VarScan.v2.4.3.jar processSomatic ${varscan_indel}
 	>>>
-	
+
 	runtime {
 		docker: docker
 		cluster: cluster_config