Partial-Bug: 1464016 Add hook via env to bgp_stress_test to set numbe…

…r of events

bgp_stress_test_suite runs tests with either default number of events (50) or
higher. Have a way to change this from outside via env BGP_STRESS_TEST_NEVENTS.
If set to -1, only initial test setup is executed and no other events are
injected.

Change-Id: I84827aa3aba29b0da37647e469b33cb573e9ed0f

src/bgp/test/bgp_stress_test.cc

@@ -2710,6 +2710,11 @@ static void process_command_line_args(int argc, const char **argv) {
 
     bool cmd_line_arg_set = false;
 
+    // Reinitialize number of events from an environment variable if set.
+    char *env = getenv("BGP_STRESS_TEST_NEVENTS");
+    if (env)
+        d_events_ = strtoll(env, NULL, 0);
+
     // Declare the supported options.
     options_description desc(