Issue #6821: resolve IDE violation 'Property apt is not allowed'
Issue #6821: resolve IDE violation 'Property apt is not allowed'

romani/checkstyle,romani/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,romani/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,romani/checkstyle,romani/checkstyle,checkstyle/checkstyle,romani/checkstyle