Change way endpoint vars are referenced (#865)

Author: jaydeluca

javaagent-declarative-configuration/oats/docker-compose.yml

@@ -7,7 +7,7 @@ services:
     environment:
       OTEL_SERVICE_NAME: "declarative-config-example-app"
       OTEL_EXPORTER_OTLP_ENDPOINT: http://lgtm:4318
-      OTEL_EXPORTER_OTLP_TRACES_ENDPOINT: http://lgtm:4318
+      OTEL_EXPORTER_OTLP_TRACES_ENDPOINT: http://lgtm:4318/v1/traces
       OTEL_EXPORTER_OTLP_PROTOCOL: http/protobuf
     ports:
       - "8080:8080"

javaagent-declarative-configuration/otel-agent-config.yaml

@@ -17,7 +17,7 @@ tracer_provider:
     - batch:
         exporter:
           otlp_http:
-            endpoint: ${OTEL_EXPORTER_OTLP_TRACES_ENDPOINT:-http://localhost:4318}/v1/traces
+            endpoint: ${OTEL_EXPORTER_OTLP_TRACES_ENDPOINT:-http://localhost:4318/v1/traces}
 
     # Configure a console exporter for exploring without a collector/backend
     - batch:
@@ -45,11 +45,11 @@ meter_provider:
     - periodic:
         exporter:
           otlp_http:
-            endpoint: ${OTEL_EXPORTER_OTLP_METRICS_ENDPOINT:-http://localhost:4318}/v1/metrics
+            endpoint: ${OTEL_EXPORTER_OTLP_METRICS_ENDPOINT:-http://localhost:4318/v1/metrics}
 
 logger_provider:
   processors:
     - batch:
         exporter:
           otlp_http:
-            endpoint: ${OTEL_EXPORTER_OTLP_ENDPOINT:-http://localhost:4318}/v1/logs
+            endpoint: ${OTEL_EXPORTER_OTLP_LOGS_ENDPOINT:-http://localhost:4318/v1/logs}