[Bug][EmlParser] Problem running the analyzer if an attachment contains the character "?"

Describe the bug
If the EML message contains an attachement with file name contains "?" character, EmlParser not working

To Reproduce
Steps to reproduce the behavior:

1. Send an e-mail with attachement filename contains ?
   Or
2. Edit EML filename for modify this values

Content-Type: application/msword; name="2 - test?.doc"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="2 - test?.doc"

Error message :
Report creation failure: [Invalid format for artifact.attachment: FileInputValue(1 - ??????.pdf,/tmp/cortex-job-34c8fXsB4PrCcvtTyvV3-3558916277537544/output/tmp2wd7gamn,application/octet-stream), expected attachment]

Work environment

• Client OS: Windows 10
• Server OS: CentOS 7
• Browse type and version:
• Cortex version: 3.1.1-1
• Cortex Analyzer/Responder name: EmlParser
• Cortex Analyzer/Responder version: 2.0

Thanks,

Regards,

Nicolas

Start at the EmlParser analyzer and reproduce the failure with the sample EML attachment whose filename contains "?". Trace attachment parsing and report creation; done means the attachment is accepted and the analyzer completes successfully with the filename preserved or safely handled.