in_opentelemetry: fix groups encoding by closing headers properly

Groups encoding where not closing the msgpack map header, additionaly once the
group header was finished instead of closing it we were appending the group finalization
record (-2).

Signed-off-by: Eduardo Silva <[email protected]>

Author: edsiper

plugins/in_opentelemetry/opentelemetry_logs.c

@@ -1321,7 +1321,7 @@ static int binary_payload_to_msgpack(struct flb_opentelemetry *ctx,
                 msgpack_pack_uint64(&mp_pck, resource->dropped_attributes_count);
             }
 
-
+            flb_mp_map_header_end(&mh_tmp);
 
             if (resource_log->schema_url) {
                 flb_mp_map_header_append(&mh);
@@ -1396,7 +1396,7 @@ static int binary_payload_to_msgpack(struct flb_opentelemetry *ctx,
                 goto binary_payload_to_msgpack_end;
             }
 
-            flb_log_event_encoder_group_end(encoder);
+            flb_log_event_encoder_group_header_end(encoder);
 
             msgpack_sbuffer_clear(&mp_sbuf);