CITest: update documentation

Update the README and the text that is displayed at the start of each CI test.

This merge request affects 1 package:

• AtlasTest/CITest

This merge request affects 3 files:

• AtlasTest/CITest/README.md
• AtlasTest/CITest/cmake/citest_post.sh.in
• AtlasTest/CITest/cmake/citest_pre.sh.in

Adding @fwinkl as watcher

added Test analysis-review-required master review-pending-level-1 labels

CI Result SUCCESS (hash d483859c)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 47844]

Looks good. Approved

Sergei L1

added review-approved label and removed review-pending-level-1 label

added analysis-review-approved label and removed analysis-review-required label

merged

mentioned in commit 695ea197

added sweep:ignore label