REUSE_CU_RESULTS: moved chroma QP condition into isValid()

6 jobs for !2018 with CHROMA_DQP in 14 minutes and 44 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Build
passed #20530
macos
build_macos

00:04:02

passed #20531
ubuntu1604
build_ubuntu1604

00:00:49

passed #20532
ubuntu1804
build_ubuntu1804

00:05:28

passed #20533
ubuntu1804-gcc8
build_ubuntu1804-gcc8

00:05:58

passed #20534
vc191x
build_vc191x

00:14:43

passed #20535
vc192x
build_vc192x

00:13:54