[MNG-6725] Skip '.mavenrc' via MAVEN_SKIP_RC=1 and '-Dmaven.skip.rc=true' on child ITs (by default on Jenkins CI).
[MNG-6725] Skip '.mavenrc' via MAVEN_SKIP_RC=1 and '-Dmaven.skip.rc=true' on child ITs (by default on Jenkins CI).

apache/maven,olamy/maven,cstamas/maven,mcculls/maven,apache/maven,olamy/maven,mcculls/maven,olamy/maven,cstamas/maven,cstamas/maven,apache/maven,mcculls/maven