fix: Action framework: Return proper exit code as set by exit instruction

Author: rsenden

fcli-core/fcli-common/src/main/java/com/fortify/cli/common/action/runner/ActionRunner.java

@@ -67,6 +67,8 @@ public final Integer _run(String[] args) {
                 processAndPrintCheckStatuses(ctx.getCheckStatuses());
                 overallCheckstatus = processAndPrintCheckStatuses(checkStatuses);
             }
+            // Retrieve exit code set by action's exit step (if any)
+            exitCode = ctx.getExitCode();
         }
         // Determine final exit code
         return exitCode==0 && overallCheckstatus==CheckStatus.FAIL ? 100 : exitCode;