Change default port for savanna api to 8386.

Since 8080 (the current default) is likely to be used
by other things.  Choose a new unassigned port as the
default.

Change-Id: I8bee3d880167e19810d06e7740842e930f06f9fb
Fixes: bug 1199226
Merge "Change default port for savanna api to 8386."