Bugs and integration tests

[elib20]

• Fixes bosonic backend bugs
• Makes most integration tests run with the bosonic backend

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Context: Makes most integration tests run with the bosonic backend

Description of the Change:

• Marks appropriate tests
• Modifies some gaussian tests to work for bosonic backend
• Fixes some minor bugs in the backend

Benefits:

Possible Drawbacks:

Related GitHub Issues:

[codecov[bot]]

Codecov Report

Merging #537 (76353bc) into gkps (aa2df81) will increase coverage by 0.02%. The diff coverage is 27.27%.

@@            Coverage Diff             @@
##             gkps     #537      +/-   ##
==========================================
+ Coverage   90.17%   90.19%   +0.02%     
==========================================
  Files          76       76              
  Lines        8354     8352       -2     
==========================================
  Hits         7533     7533              
+ Misses        821      819       -2     

Impacted Files	Coverage Δ
strawberryfields/compilers/bosonic.py	100.00% <ø> (ø)
...ryfields/backends/bosonicbackend/bosoniccircuit.py	17.12% <14.28%> (+0.11%)	:arrow_up:
...trawberryfields/backends/bosonicbackend/backend.py	16.28% <33.33%> (ø)
strawberryfields/ops.py	96.98% <100.00%> (ø)

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