HPCC-1845 Fix graph loading time

Change timeout on graph control to 30 seconds.

Signed-off-by: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
HPCC-1845 Fix graph loading time
Change timeout on graph control to 15 seconds after review of 30 seconds is a configurable option and not default timeout.
Merge pull request #3787 from miguelvazq/iss1845

HPCC-1845 Fix graph loading time

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>