fix import

Author: calypsomatic

src/test/java/bio/terra/buffer/integration/CreateProjectFlightIntegrationTest.java

@@ -98,6 +98,7 @@
 import bio.terra.stairway.Flight;
 import bio.terra.stairway.FlightContext;
 import bio.terra.stairway.FlightMap;
+import bio.terra.stairway.FlightState;
 import bio.terra.stairway.FlightStatus;
 import bio.terra.stairway.RetryRule;
 import bio.terra.stairway.Step;