It looks like Knox builds are failing with the error "Error creating assembly archive bin: posix is not a legal value for this attribute"
It seems to be related to KNOX-1200 (which interestingly does not have
commit associated to it)
Changing the version back to 14 seems to fix the builds
<parent>
<groupId>org.apache</groupId>
<artifactId>apache</artifactId>
<!--<version>19</version>-->
<version>14</version>
</parent>
