A hit with duplicating field names is not displayed in Resilient

[siniysv]

Hi all, I've recently faced an issue with MISP app (rc-cts-misp):
when a thread feed service returns for an artifact a hit with duplicating field names, Resilient doesn't display the hit and doesn't make the artifact red. I've fixed it locally like here siniysv@1cc78f8
My fix just makes a field name unique by adding a number to it.

Second issue is with MISP tag parsing, the app expects to see tags with colon(:) but there might be a single word tags as well. Again, fixed it locally by adding try-except siniysv@1cc78f8

There are issues with Chinese symbols in artifacts as well, the app throws exception because of Unicode->ASCII conversion: UnicodeEncodeError in LOG.info("MISP Lookup: " + str(artifact_value)), probably because of Python version.

[hpyle]

Thanks for this, we'll address in an upcoming release [INT-673]