modified vcf name

tasks/extract_info.wdl

@@ -18,6 +18,6 @@ task extract_info {
 		dataDisk: "cloud_ssd " + disk_size + " /cromwell_root/"
 	}
 	output {
-		File vcf_info = "${sampleName}.variant_quality_location.vcf"
+		File vcf_info = "${sampleName}_variant_quality_location.vcf"
 	}
 }