revise workflow

inputs

   "{{ project_name }}.read2": "{{ read2 }}",
   "{{ project_name }}.disk_size": "{{ disk_size }}",
   "{{ project_name }}.cluster_config": "OnDemand bcs.a2.xlarge img-ubuntu-vpc",
-  "{{ project_name }}.fastqc.docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/fastqc:v0.11.5",
-  "{{ project_name }}.fastqscreen.docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/fastqscreen:0.12.0",
+  "{{ project_name }}.fastqc_docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/fastqc:v0.11.5",
+  "{{ project_name }}.fastqscreen_docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/fastqscreen:0.12.0",
   "{{ project_name }}.screen_ref_dir": "/data/home/shangjun/JS_data/source_tree/source_tree/project_code/choppy_app/reference/fastq_screen_reference/",
   "{{ project_name }}.fastq_screen_conf": "/data/home/shangjun/JS_data/source_tree/source_tree/project_code/choppy_app/reference/fastq_screen_reference/fastq_screen.conf"
 }

workflow.wdl

 	File fastq_screen_conf
 	File read1
 	File read2
-	String fastqc.docker
-	String fastqscreen.docker
+	String fastqc_docker
+	String fastqscreen_docker
 	String cluster_config
 
 	call fastqc.fastqc as fastqc {
 			read1=read1,
 			read2=read2,
 			cluster=cluster_config,
-			docker=fastqc.docker
+			docker=fastqc_docker
 		}
 
 	call fastqscreen.fastq_screen as fastqscreen {
 			read1=read1,
 			read2=read2,
 			cluster=cluster_config,
-			docker=fastqscreen.docker,
+			docker=fastqscreen_docker,
 			screen_ref_dir=screen_ref_dir,
 			fastq_screen_conf=fastq_screen_conf
 		}