update jinja templates

[AurelienJaquier]

• use distance(x) twice in distribution function in all templates so that step functions (that need the distance twice) can be used. Typical use: for calicum hot spot.
• add getCell function to default jinja so that the output hoc can be used in BlueCelluLab
• fix load_morpholpogy function of neurodamus_sbo template, as discussed in HPCTM-1754 ticket

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (60dbae6) 91.81% compared to head (41da32b) 91.81%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #268   +/-   ##
=======================================
  Coverage   91.81%   91.81%           
=======================================
  Files          22       22           
  Lines        1149     1149           
=======================================
  Hits         1055     1055           
  Misses         94       94           

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[ilkilic]

looks good to me