Bump Bazel version to 3.0.0
Bump Bazel version to 3.0.0

Change-Id: I1bf55d575bd61cfc920d5f2c6b6f33164096540e

GerritCodeReview/plugins_javamelody,GerritCodeReview/plugins_javamelody,GerritCodeReview/plugins_javamelody