NXCM-5398: Kenai role was applied unconditionally

Hence, every user, even anonymous got it, even without
logging in into Kenai.

Problem was introduced in commit:
5bec64796705e8f6cc754a4f9d8d5f222959cd12

When the plugin was moved in into OSS sources.

Issue:
https://issues.sonatype.org/browse/NXCM-5398

CI
https://bamboo.zion.sonatype.com/browse/NX-OSSF17-1