Fix sysctl for salt-master optimization

Due to incorrect structure of the metadata,
the optimizations for salt-master multicast
RPC were not applied.

Add the missing key 'kernel' in the structure.

PROD-27850

Change-Id: I433d55212bd6331e982b41a62168b12628fc2f13
(cherry picked from commit 6cabe355dd067d2ac23bcd784eab781dd4733229)
1 file changed