IDF v4.x deprecates esp_event_loop.h 'tcpip_adapter_init' and 'esp_event_loop_init'

[hire-vladimir]

Warnings are seen at compile time for module deprecation. The new way forward example is found at https://github.com/espressif/esp-idf/blob/master/examples/wifi/getting_started/station/main/station_example_main.c

esp_event_loop.h:2:2: warning: #warning "esp_event_loop.h is deprecated, please include esp_event.h instead" [-Wcpp]
app_main.c:49:5: warning: 'tcpip_adapter_init' is deprecated [-Wdeprecated-declarations]
app_main.c:51:5: warning: 'esp_event_loop_init' is deprecated [-Wdeprecated-declarations]