Changing the value type of http_connect_timeout

The value type of http_connect_timeout definition
is changed from Bool to Int value. Python treats
a value more than 1 as True but oslo config defines
Boolean values as 'true, '1', 'yes' and 'on'.
So http_connect_timeout is only configured 1 or None.

Change-Id: I53075cc04d0ccea543f8e657279534208ed03058
Closes-bug: #1368545
Merge "Changing the value type of http_connect_timeout"