boobank: add module suravenir

This module adds life insurance provider suravenir (previ-direct.com). It can be accessed through several brokers, at least assurancevie.com (tested) and Linxea (not tested because I'm not a customer).
This implementation supports boobank's "list", "history" and "investment" commands, albeit minimally.
10 jobs for suravenir in 0 seconds (queued for 1592 minutes and 16 seconds)
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Status Job ID Name Coverage
  Build
failed #10188
build:2.7

failed #10189
build:3

 
  Test
skipped #10191
allowed to fail
lint:2.7
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allowed to fail
lint:3
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pyflakes:2.7
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pyflakes:3
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unittests:2.7
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unittests:3
 
  Deploy
skipped #10196
doc:2.7
skipped #10197
doc:3
 
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