MULE-6884: HTTP/HTTPS Connectors: tcpNoDelay

- Fixed merge conflicts. Now the HttpServerConnectionTestCase extends AbstractMuleContextTestCase to get access to the MuleContext.

- Fixed typo in getter method.
(cherry picked from commit 035dc5619def9c87b620cf38e89c5384a3b26d8e)
(cherry picked from commit 5695ad3c1c733953df95965becb7687a2e4e9780)
(cherry picked from commit 7e6ec89da970178a698e1c2bfc4eacabcf8b438b)

Conflicts:
	transports/http/src/main/java/org/mule/transport/http/HttpServerConnection.java
	transports/http/src/test/java/org/mule/transport/http/HttpServerConnectionTestCase.java