fixed CLOUDSTACK-6261: remove the forceful timeout setting when login to NetScaler.

(cherry picked from commit e07d0ddabfedad137856c3c9ae7de3a96fe25feb)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Conflicts:
	plugins/network-elements/netscaler/src/com/cloud/network/resource/NetscalerResource.java