remove session_manager_subscribe_xxx() API; convert session closing events to pseudo packets

when a session is closed, use the packet manager to create a pseudo packet,
    set the session to be closed as packet Exdata, and schedule it to the packet forwarding stage.
    when the pseudo packet free, the session will be free.

test/CMakeLists.txt

@@ -1,7 +1,7 @@
 #add_subdirectory(packet_inject)
 add_subdirectory(packet_tool)
-add_subdirectory(session_debugger)
-add_subdirectory(lpi_plus)
+#add_subdirectory(session_debugger)
+#add_subdirectory(lpi_plus)
 #add_subdirectory(decoders/http)
 #add_subdirectory(decoders/socks)
 #add_subdirectory(decoders/stratum)

test/monitor/CMakeLists.txt

@@ -26,7 +26,8 @@ foreach(tfile ${MONITOR_TEST_FILE})
 endforeach()
 
 set(MONITOR_TEST_RUN_DIR ${CMAKE_CURRENT_BINARY_DIR})
-add_test(NAME MONITOR_ENV_SETUP COMMAND sh -c "mkdir -p ${MONITOR_TEST_RUN_DIR}/conf &&
+add_test(NAME MONITOR_ENV_SETUP COMMAND sh -c "mkdir -p ${MONITOR_TEST_RUN_DIR}/metrics &&
+                                           mkdir -p ${MONITOR_TEST_RUN_DIR}/conf &&
                                            mkdir -p ${MONITOR_TEST_RUN_DIR}/plugin && 
                                            mkdir -p ${MONITOR_TEST_RUN_DIR}/log && 
                                            mkdir -p ${MONITOR_TEST_RUN_DIR}/pcap &&