Rename core_config to buffer_config namespace

sf-buffer/src/FrameUdpReceiver.cpp

@@ -3,7 +3,7 @@
 #include "FrameUdpReceiver.hpp"
 
 using namespace std;
-using namespace core_buffer;
+using namespace buffer_config;
 
 FrameUdpReceiver::FrameUdpReceiver(
         const uint16_t port,

sf-buffer/src/UdpReceiver.cpp

@@ -7,7 +7,7 @@
 #include "buffer_config.hpp"
 
 using namespace std;
-using namespace core_buffer;
+using namespace buffer_config;
 
 UdpReceiver::UdpReceiver() :
     socket_fd_(-1)

sf-buffer/src/main.cpp

@@ -13,7 +13,7 @@
 
 using namespace std;
 using namespace chrono;
-using namespace core_buffer;
+using namespace buffer_config;
 
 void* get_live_stream_socket(const string& detector_name, const int source_id)
 {