Unify 'Content-Type' header key name in API reference
Unify 'Content-Type' header key name in API reference

In current API reference, 'Content-Type' header key name is used in response
parameter tables except Container GET table. On the other hand, 'Content_Type'
is used in Container GET table.

This patch fixes the 'Content_Type' in Container GET table to 'Content-Type'.

Change-Id: Idf242477dd089202635b69b85b0c19739e0c6321

openstack/swift,tipabu/swift,smerritt/swift,openstack/swift,openstack/swift,smerritt/swift,nadeemsyed/swift,nadeemsyed/swift,matthewoliver/swift,tipabu/swift,tipabu/swift,swiftstack/swift,matthewoliver/swift,tipabu/swift,swiftstack/swift,matthewoliver/swift,openstack/swift,swiftstack/swift,smerritt/swift,nadeemsyed/swift,matthewoliver/swift,smerritt/swift,nadeemsyed/swift