The EDI specifications allow one or more DTM segments between the BSN and the first HL loop

[CodeSmell]

The Standard Parser currently throws an X12ParserException noting that it "expected HL segment but found DTM"
However, EDI guidance allows one or more DTM segments to be added to the EDI transaction set before the first HL loop.

ST*856*368090001
BSN*00*05755986*20190523*171543*0002
DTM*011*20210323
DTM*067*20210323
HL*1**S
...
SE*296*368090001

[CodeSmell]

The fix will allow any DTM segment found between the BSN and the HL to be added to the Asn Transaction Set.
Any other segment id that is added between the BSN and the HL will result in an X12ParserException