fix test to conform to new transform behavior

new behavior requires transform('*.ext') to match multiple files
ending with '.ext'. Prior behavior would match multiple files
if only '.ext' was specified, however this leads to pipelines
whose behavior is difficult to predict because if the number
of files coming in changes then the number of expected output
files changes and the pipeline fails unless those files are
produced. Therefore the '*.ext' behavior must be explicitly
invoked now by using the glob-like syntax

tests/transform_to/test.groovy

@@ -5,7 +5,7 @@ hello = {
 }
 
 world = {
-    transform('.fastq.gz','.xml')  to('_fastqc.zip','.tsv')  {
+    transform('*.fastq.gz','.xml')  to('_fastqc.zip','.tsv')  {
         exec """
             cat $input1.gz > $output1.zip