Add ResolverProviderTest unit test (#337) #679

Job	Run time
Unit tests (8)	2m 1s
Build (8)	1m 8s
Full verify (8)	1m 45s
Setup ITs	4s
Cassandra ITs (RELEASE-3.X, 8)	20m 24s
Cassandra ITs (RELEASE-4.X, 8)	21m 30s
Scylla ITs (ENTERPRISE-RELEASE, 8)	29m 24s
Scylla ITs (ENTERPRISE-PRIOR-RELEASE, 8)	36m 5s
Scylla ITs (OSS-RELEASE, 8)	10m 17s
Scylla ITs (OSS-PRIOR-RELEASE, 8)	10m 24s
Scylla ITs (ENTERPRISE-RC, 8)	9m 59s
Scylla ITs (OSS-RC, 8)	10m 33s
	2h 33m 34s

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