TEST: Force ITK_GLOBAL_DEFAULT_NUMBER_OF_THREADS=4

Affect bfTvMeanShiftSmoothingImageFilterOptim and apTvSeSegmentation

Closes #1982
15 jobs for !617 with 1982-fix-test-threads in 44 minutes and 27 seconds (queued for 7 seconds)
detached
Status Job ID Name Coverage
  Precheck
passed #14150
fast-build

00:09:04

passed #14151
legal-check

00:01:51

failed #14134
fast-build

00:00:19

failed #14135
allowed to fail
legal-check

00:01:49

 
  Prepare
passed #14137
centos-xdk-prepare

00:01:53

passed #14138
macos
macos-xdk-prepare

00:01:11

passed #14136
ubuntu-xdk-prepare

00:00:45

passed #14139
windows10
windows-10-prepare

00:01:36

passed #14140
windows8
windows-8-prepare

00:01:34

 
  Build
passed #14143
centos-xdk-build

00:28:10

passed #14141
debian-build

00:24:58

passed #14144
macos
macos-xdk-build

00:20:51

passed #14142
ubuntu-xdk-build-doc

00:33:24

passed #14145
windows10
windows-10-build

00:30:23

passed #14146
windows8
windows-8-build

00:29:32