Fix input of DPPP step

compress_pipeline.cwl

@@ -106,7 +106,13 @@ steps:
       - id: parset
         source: define_parset/output
       - id: msin
-        source: fix_baselines/msout
+        source: 
+          - fix_baselines/msout
+          - fix_ai_2015/msout
+          - fix_weight_issue/msout
+          - fix_ai_2013/msout
+          - msin
+        pickValue: first_non_null
       - id: msout_name
         source: msin
         valueFrom: '$("COMPRESSED_" + self.basename)'