(ASN 856) Some data related problems are throwing X12ParsingException making 824 difficult to generate

[CodeSmell]

The X12Parser and StandardX12Parser will throw an X12ParserException when the sourceData it gets is not correct.
That breaks down into the following

1. Invalid Envelope (ISA...ISE)
2. Unexpected segment (ISA, GS, ST, SE, GE, ISE)
3. Unexpected exception (wrapped)

These are reasonable errors to abort any further parsing and return an exception.

The DefaultAsn856TransactionSetParser will also throw an exception for the following:

1. When the BSN line is missing
2. When a segment other than DTM is found between the BSN and the first loop
3. When the HL loops are incorrect (missing, orphans, out of order etc)

The 2nd and 3rd set of errors should make is easier to generate an 824 response as the envelope, group and BSN line were are parsable.