testsuite tweaked for GPU-MPI

Description

Tweeked some reference values and added ConvRelDens=1e-6 to test lda_u/09* so that the current develop branch passes the fosscuda-2018a_mpi test.

Note: there are still many tests not using CUDA, but at least it does not break the test.

Codecov Report

Merging #565 into develop will increase coverage by 0.16%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #565      +/-   ##
===========================================
+ Coverage    70.71%   70.87%   +0.16%     
===========================================
  Files          460      460              
  Lines        85446    85448       +2     
===========================================
+ Hits         60420    60562     +142     
+ Misses       25026    24886     -140

Impacted Files	Coverage Δ
src/basic/accel.F90	79.53% <0%> (+0.12%)
src/hamiltonian/hamiltonian_base_inc.F90	95.64% <0%> (+1.35%)
src/grid/nl_operator_inc.F90	67.82% <0%> (+4.34%)
src/grid/nl_operator.F90	70.97% <0%> (+5.8%)
src/grid/boundaries.F90	94.78% <0%> (+10.43%)
src/grid/boundaries_inc.F90	95.68% <0%> (+14.28%)
src/basic/accel_inc.F90	100% <0%> (+28.88%)
src/grid/subarray_inc.F90	97.56% <0%> (+43.9%)

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changed milestone to %10.0

added Testsuite label

merged

mentioned in commit 0c2c4c05

changed title from testsuite trweeked for GPU-MPI to testsuite tweaked for GPU-MPI

changed the description

added in Changelog label