tcp_transport: renamed transport related header files to esp_ prefixed to avoid collisions

tcp_transport component used public header files such as 'transport.h', etc. which are too generic and might collide with user or user libraries headers
This change closes #2417

components/mqtt/CMakeLists.txt

@@ -3,17 +3,8 @@ set(COMPONENT_PRIV_INCLUDEDIRS "esp-mqtt/lib/include")
 set(COMPONENT_SRCS "esp-mqtt/mqtt_client.c"
                    "esp-mqtt/lib/mqtt_msg.c"
                    "esp-mqtt/lib/mqtt_outbox.c"
-                   "esp-mqtt/lib/platform_esp32_idf.c"
-                   "esp-mqtt/lib/transport_ws.c")
+                   "esp-mqtt/lib/platform_esp32_idf.c")
 
 set(COMPONENT_REQUIRES lwip nghttp mbedtls tcp_transport)
 
 register_component()
-
-if(GCC_NOT_5_2_0)
-    # Temporary suppress "format-overflow" warning until we are fixed in esp-mqtt repo
-    set_source_files_properties(
-        esp-mqtt/lib/transport_ws.c
-        PROPERTIES COMPILE_FLAGS
-        -Wno-format-overflow)
-endif()