Catch HGVSInvalidIntervalError within guess-plausible-variant

[jtratner]

e.g., this dummy deletion was failing ATM:c.8816_8817del with an HGVSInvalidIntervalError. Otherwise it did work :) I think fair to skip it because you do recover other valid variants:

In [99]:  pv = list(generate_plausible_variants(hdp, hv, hp.parse_hgvs_variant('ATM:c.8816_8817del')))
DEBUG:__main__:generate_plausible_variants(ATM:c.8816_8817del)
DEBUG:__main__:  NM_001351835.1:c.8816_8817del: failed: HGVSInvalidIntervalError: c.8816 coordinate is out of bounds
DEBUG:hgvs.variantmapper:Replaced reference sequence in NM_001351834.1:c.8816_8817del with GA
DEBUG:__main__:  NM_001351834.1:c.8816_8817del: validated
DEBUG:__main__:  NM_001351836.1:c.8816_8817del: failed: HGVSInvalidIntervalError: c.8816 coordinate is out of bounds
DEBUG:__main__:  NM_000051.3:c.8816_8817del: validated

[coveralls]

Pull Request Test Coverage Report for Build 346

• 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 92.4%

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Totals
Change from base Build 345:	0.0%
Covered Lines:	2164
Relevant Lines:	2342

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💛 - Coveralls

[reece]

Agreed. Thanks for the PR!

[jtratner]

Thanks @reece :)