Merge pull request #1709 from lilai23/feature_opentelemetry_backend #142

Job	Run time
set-execution-conditions	12s
download midwares and cache	6s
build agent and cache	5m 42s
Test for xds service discovery with spring-server using envoy	3m 52s
Test for xds service discovery with only sermant	3m 48s
Test for agentcore dynamic config (127.0.0.1:8848, NACOS)	59s
Test for agentcore dynamic config (127.0.0.1:2181, ZOOKEEPER)	54s
Test for xds service discovery with spring-client using enovy	3m 49s
Test for xds router and lb with router plugin (2.0.2.RELEASE, 1.19, Finchley.RELEASE, 4.4, 2.2.0,...	5m 34s
Test for xds router and lb with router plugin (2.1.0.RELEASE, 1.23, Greenwich.RELEASE, 4.4.1, 2.3...	5m 32s
Test for xds router and lb with router plugin (2.2.0.RELEASE, 1.25, Hoxton.RELEASE, 4.5, 2.4.0, 3...	5m 15s
Test for xds router and lb with router plugin (2.3.0.RELEASE, 1.26, Hoxton.RELEASE, 4.5.3, 2.5.0,...	5m 28s
Test for xds router and lb with router plugin (2.4.0, 1.27, 2020.0.0, 4.5.7, 2.6.0, 4.2.2, 4.1.2)	5m 13s
Test for xds router and lb with router plugin (2.6.2, 1.29, 2021.0.0, 4.5.10, 2.7.3, 4.7.2, 4.1.3)	5m 54s
Test for xds router and lb with router plugin (2.7.17, 1.30, 2021.0.3, 4.5.13, 2.7.5, 4.12.0, 4.1.5)	5m 24s
	57m 42s

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