Revert "(#15797) Change the argument to chkconfig from 'on' to 'reset'"

This reverts commit d2012aec0a2cce06f8db830c3f4d5a4950fe9ce0.

The chkconfig line can use - to indicate the service should
not be enabled by default. In this case, reset disables all
runlevels, which is the opposite of what enable=>true should do.

The original bug referenced in #15797, #528, was also reverted
for (presumably) the same reason:

https://github.com/puppetlabs/puppet/commit/41e1285553870f0b425b88a6209fab8733b421b2