Merge branch 'slb-nested-ref-validation' into 'master'

Slb nested ref validation

See merge request !321

(cherry picked from commit 3bfc2a99)

5ac3cb70 Fixing nested $ref validation
c1e6dce4 Adding JUnit
cfa0a068 Test failed JUnit
df0f4917 Merge remote-tracking branch 'origin/master' into
4c1be934 Validate the JUnit
8613682f Merge remote-tracking branch 'origin/master' into slb-nested-ref-validation
e2284b91 Merge remote-tracking branch 'origin/master' into slb-nested-ref-validation
2 jobs for !327 with cherry-pick-3bfc2a99 in 8 seconds (queued for 3 seconds)
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