Fix license/javadoc
[NEXUS-7336] Remove obsolete site repository configuration modifiers
Merge remote-tracking branch 'origin/NEXUS-7336-osecurity-step-3' into NEXUS-7336-osecurity-step-4

Conflicts:
	plugins/basic/nexus-site-repository-plugin/src/main/java/org/sonatype/nexus/repository/site/plugin/config/SiteRepositorySecurityConfigurationModifier.java