Fixing failing tests

Author: tot19

src/sources/splunk_hec/mod.rs

@@ -543,7 +543,7 @@ impl SplunkSource {
                         .as_ref()
                         .and_then(|v| v.to_str().ok())
                         .map(|h| h.to_ascii_lowercase().contains("application/json"))
-                        .unwrap_or(false);
+                        .unwrap_or(true);
 
                     if !ok {
                         return Err(warp::reject::custom(ApiError::UnsupportedContentType));