Merge branch 'fix/test-sequential-diffusion3d' into 'master'

[test][sequential] remove failing grid/solver combinations

See merge request !2099

(cherry picked from commit e7830614)

d66f614c [test][sequential] Throw exception if pressure solver doesn't converge
72f156b0 [test][sequential1p] use alugrid for test
886d9706 [test][sequential1p] require UMFPack