Check before displaying the value.

[mzfr]

If in some case the dict snare_stats is missing value then that would result in jinja exception

Fixes: #359

[afeena]

@mzfr please resolve problems with tests

[mzfr]

@afeena I've updated the tests since there was some issue with \n\t things.

[coveralls]

Pull Request Test Coverage Report for Build 1226

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 76.372%

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Totals
Change from base Build 1219:	0.0%
Covered Lines:	1406
Relevant Lines:	1841

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💛 - Coveralls