Investigate warnings output by maven-clover2-plugin with grover enabled

[INFO] Elapsed time = 0.049 secs. (40.816 files/sec, 3,938.776 srclines/sec)
Downloading: https://m2proxy.atlassian.com/repository/internal//com/cenqua/clover/grover/3.0.0-m3/grover-3.0.0-m3.pom
[INFO] Unable to find resource 'com.cenqua.clover:grover:pom:3.0.0-m3' in repository central (https://m2proxy.atlassian.com/repository/internal/)
Downloading: https://maven.atlassian.com/public/com/cenqua/clover/grover/3.0.0-m3/grover-3.0.0-m3.pom
[INFO] Unable to find resource 'com.cenqua.clover:grover:pom:3.0.0-m3' in repository atlassian-public (https://maven.atlassian.com/public)
Downloading: https://maven.atlassian.com/private/com/cenqua/clover/grover/3.0.0-m3/grover-3.0.0-m3.pom
[INFO] Unable to find resource 'com.cenqua.clover:grover:pom:3.0.0-m3' in repository atlassian-private (https://maven.atlassian.com/private)
Downloading: https://m2proxy.atlassian.com/repository/m1//com/cenqua/clover/grover/3.0.0-m3/grover-3.0.0-m3.pom
[INFO] Unable to find resource 'com.cenqua.clover:grover:pom:3.0.0-m3' in repository atlassian-m1-repository (https://m2proxy.atlassian.com/repository/m1/)
[INFO] [groovy:generateStubs {execution: default}]
[INFO]  Generated 1 Java stub