Fix for testcase failing in 3.5.6

[rahkumar651991]

What does this PR do?

Fixes the testcase failing in python version 3.5.6

What issues does this PR fix or reference?

#355 and #322

Tests written?

Yes/No

[coveralls]

Pull Request Test Coverage Report for Build 306

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 64 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.02%) to 92.383%

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Files with Coverage Reduction	New Missed Lines	%
/home/travis/virtualenv/python2.7.15/lib/python2.7/site-packages/jnpr/jsnapy/jsnapy.py	16	94.62%
/home/travis/virtualenv/python3.6.7/lib/python3.6/site-packages/jnpr/jsnapy/jsnapy.py	16	94.62%
/home/travis/virtualenv/python3.7.1/lib/python3.7/site-packages/jnpr/jsnapy/jsnapy.py	16	94.62%
/home/travis/virtualenv/python3.8.0/lib/python3.8/site-packages/jnpr/jsnapy/jsnapy.py	16	94.62%

Totals
Change from base Build 301:	0.02%
Covered Lines:	5264
Relevant Lines:	5698

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💛 - Coveralls