(maint) Fix interpolation in proc invocations in sles init script
(maint) Fix interpolation in proc invocations in sles init script

The interpolations in the sles init script template had a section in
single quotes with a bash variable. This would lead to the variable
being rendered literally, without interpolation. This commit adds some
double quotes around the section and escapes the double quotes within
it.

puppetlabs/ezbake,puppetlabs/ezbake,puppetlabs/ezbake