add javaxmx parameter_meta

fastqc.wdl

@@ -116,6 +116,8 @@ task Fastqc {
         kmers: {description: "Equivalent to fastqc's --kmers option.", category: "advanced"}
         dir: {description: "Equivalent to fastqc's --dir option.", category: "advanced"}
         threads: {description: "The number of cores to use.", category: "advanced"}
+        javaXmx: {description: "The maximum memory available to the program. Should be lower than `memory` to accommodate JVM overhead.",
+            category: "advanced"}
         memory: {description: "The amount of memory this job will use.", category: "advanced"}
         timeMinutes: {description: "The maximum amount of time the job will run in minutes.", category: "advanced"}
         dockerImage: {description: "The docker image used for this task. Changing this may result in errors which the developers may choose not to address.",