Ceph

Issue description:-

While creating a EC pool if we use the ruleset "replicated_ruleset" with type "replicated", there is no error thrown and the pool creation proceeds successfully. This shouldn't be allowed, as EC pools should be created only with "ruleset type erasure"

example:-
rule replicated_ruleset {
ruleset 0
type replicated
min_size 1
max_size 10
step take default
step chooseleaf firstn 0 type host
step emit

ceph osd pool create ecpooltest1 100 erasure default replicated_ruleset

ceph osd pool  get ecpooltest1 crush_ruleset
crush_ruleset: 0