Resolve "BUG: thread error on Astrocyte"

Closes #40 (closed) and Closes #39 (closed)

workflow/conf/aws.config

+workDir = 's3://'
 aws.client.storageEncryption = 'AES256'
 aws {
+  region = ''
   batch {
     cliPath = '/home/ec2-user/miniconda/bin/aws'
   }
 }
 
 process {
+  executor = 'awsbatch'
+  queue = 'default-'
   cpus = 1
   memory = '10 GB'
 }
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