[BUG] Strict Parser adding namespace in the wrong spot

[mefrehner]

Describe the bug
The Strict Parser is adding the namespace in the wrong spot of the XML header making the header not end with “?>” making it invalid.

To Reproduce
Setup steps (if required). Example:

1. Install Mirth Connect version 4.2.0
2. Create a Channel
3. Set all data types to HL7 v2.x and turn check "Use Strict Parser" for the inbound and outbound properties.
4. Create an XSLT transformer step and set msg equal to the XML generated by the XSLT transformer step

Steps to reproduce the behavior:

1. Send an HL7 message into the channel
2. Check the error

Expected behavior
The Strict Parser adds the namespace to the XML header, and makes sure that it ends with “?>”

Actual behavior
The Strict Parser adds the namespace to the XML header, but the header does not end with “?>” making it invalid.

Workaround(s)
Are there one or more workarounds for this issue currently?