Update bwa version to match index.

workflow/conf/biohpc.config

@@ -12,7 +12,7 @@ process {
     cpus = 32
   }
   $alignReads{
-    module = ['python/3.6.1-2-anaconda', 'bwa/intel/0.7.15', 'samtools/intel/1.3']
+    module = ['python/3.6.1-2-anaconda', 'bwa/intel/0.7.12', 'samtools/intel/1.3']
     cpus = 32
     memory = 12.GB
   }