CMake module path to beginning

Move the path to the beginning, so that we can use it early.
Specifically, it was after the SCTP module, and the next commit will use
the Findsctp.cmake module to find SCTP. Use the cmake-proper variable.

CMakeLists.txt

@@ -36,6 +36,8 @@ if(NOT DEFINED ENV{CPM_SOURCE_CACHE})
 endif()
 include("cmake_targets/CPM.cmake")
 
+set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_targets/tools/MODULES" "${CMAKE_MODULE_PATH}")
+
 ##############################
 ### CCache: reduce compilation time
 ##############################
@@ -1710,7 +1712,6 @@ include_directories("${NFAPI_DIR}/pnf_sim/inc")
 add_library(oai_iqplayer MODULE
 	${OPENAIR_DIR}/radio/iqplayer/iqplayer_lib.c
 	)
-set(CMAKE_MODULE_PATH "${OPENAIR_DIR}/cmake_targets/tools/MODULES" "${CMAKE_MODULE_PATH}")
 
 #################################
 # add executables for operation