code: public AzkabanExecuteFlowStatus executeFlow(String projectName,
                                                String flowName,
                                                Map<String, String> flowParameters) throws AzkabanClientException {
      return executeFlowWithOptions(projectName, flowName, null, flowParameters);
    }
docs: Execute a flow with flow parameters. The project and flow should be created first.
  
  @param projectName project name
  @param flowName  flow name
  @param flowParameters  flow parameters
  
  @return The status object which contains success status and execution id.