Modified keyword for ipmi user.

The default channel in the Keyword "Set Channel Access" is always 1.
Let user to specify channel while running, if not, the default is 1.

Example:
robot -v OPENBMC_HOST:x.x.x.x -v CHANNEL_NUMBER:2 ipmi/test_ipmi_user.robot

Signed-off-by: Tony Lee <tony.lee@quantatw.com>
Change-Id: I1363b1bed87e84ff14ab674969a67988bdc71c8d
diff --git a/lib/resource.robot b/lib/resource.robot
index 0fb99bc..f128d23 100755
--- a/lib/resource.robot
+++ b/lib/resource.robot
@@ -54,6 +54,7 @@
 ${NETWORK_TIMEOUT}         18
 ${ICMP_TIMESTAMP_REQUEST}  13
 ${ICMP_ECHO_REQUEST}       8
+${CHANNEL_NUMBER}          1
 
 # BMC debug tarball parameter
 ${DEBUG_TARBALL_PATH}  ${EMPTY}