Begin using environment lapse/1.8.0-xl on ATS-2.

[KineticTheory]

Background

• For ATS-2, increment default dev env to lapse/1.8.0-xl.

Status

• Reference:
  • Pre-Merge Code Review
  • CDash Status
• Checks
  • Travis/Appveyor CI checks pass
  • Code coverage does not decrease
  • Valgrind test passes
  • Toss3 checks pass
  • Trinitite checks pass
  • Code reviewed/approved, sufficient DbC checks, testing, documentation

[codecov]

Codecov Report

Merging #1120 (6b5d628) into develop (385284a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           develop   #1120   +/-   ##
=======================================
  Coverage     88.9%   88.9%           
=======================================
  Files          373     373           
  Lines        19570   19570           
=======================================
  Hits         17416   17416           
  Misses        2154    2154           

[KineticTheory]

Nightly regressions work with these changes.