Fix layout of cholesky(Symmetric(view(BandedMatrix)))

[DanielVandH]

Fixes #450

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.84%. Comparing base (47c15ab) to head (d30ff72).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #451      +/-   ##
==========================================
+ Coverage   89.61%   89.84%   +0.23%     
==========================================
  Files          25       25              
  Lines        3571     3643      +72     
==========================================
+ Hits         3200     3273      +73     
+ Misses        371      370       -1     

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[DanielVandH]

I guess LTS has a different way of handling these layouts? Am I testing this poorly or can I just add an additional specific cholcopy test and skip the layout tests on LTS?