Merge pull request #589 from mulesoft/MULE-7515

MULE-7515 - using buffered input stream instead of socket input stream d...
(cherry picked from commit 239da75c03d7bd8dcb25fb6211ec10787b201642)

(cherry picked from commit f3434f4b3c445ce99705ffe598ad577ef67f2f3d)

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

(cherry picked from commit 51dbb20c927af3b6c58f4d16afa677632c5b1acd)