facet name using {!key} doesn't work for interval facets

[Phanindra R]

Hi,

     According to
https://cwiki.apache.org/confluence/display/solr/Faceting#Faceting-IntervalFaceting,
a facet name could be assigned to interval facets, which then replaces the
field name as the facet name in the response.

The syntax I used: facet.interval={!key=myName}myField

But Solr 4.10.2 throws following exception:

"error": { "msg": "undefined field: \"{!key=myName}myField\"", "code": 400 }