Add additional counters in serverStatus().metrics.commands for collMod and create.

Something like:

{
create: { 
failed: Long("0"), 
validator: { total: Long("0"), failed: Long("0"), jsonSchema: Long("0")}, 
total: Long("23") 
},
collMod: { 
failed: Long("0"), 
validator: { total: Long("0"), failed: Long("0"), jsonSchema: Long("0")}, 
total: Long("0") 
}
...
}

Increment count for 'validator.total' if non-empty 'validator' object was passed as option to the command. Increment 'validator.jsonSchema' if $jsonSchema was used anywhere within 'validator' object.