Update python getting started to use OTLP http/protobuf (#523)

* Update python getting started to use OTLP http/protobuf

* Use http/protobuf for metrics and logs

getting-started-guides/python/Instrumented/README.md

@@ -19,11 +19,11 @@ cd ./getting-started-guides/python/instrumented/
 6. Install dependencies listed in `requirements.txt` 
 7. To send telemetry data to New Relic, set the following environment variables
 ```shell
-OTEL_EXPORTER_OTLP_ENDPOINT="https://otlp.nr-data.net:4317"
+OTEL_EXPORTER_OTLP_ENDPOINT="https://otlp.nr-data.net"
 OTEL_EXPORTER_OTLP_HEADERS="api-key=[YOUR_INGEST_KEY]"
 ```
 * Make sure to use your [ingest license key](https://docs.newrelic.com/docs/apis/intro-apis/new-relic-api-keys/#license-key)
-* If your account is based in the EU, set the endpoint to: https://otlp.eu01.nr-data.net:4317
+* If your account is based in the EU, set the endpoint to: https://otlp.eu01.nr-data.net
 8. Set this environment variable to name the demo app:
 ```shell
 OTEL_SERVICE_NAME=getting-started-python

getting-started-guides/python/Instrumented/app.py

@@ -15,7 +15,7 @@
 from opentelemetry import trace
 from opentelemetry.sdk.trace import TracerProvider
 from opentelemetry.sdk.trace.export import BatchSpanProcessor
-from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
+from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
 from opentelemetry.trace.status import Status, StatusCode
 
 # Initialize tracing and an exporter that can send data to an OTLP endpoint
@@ -29,7 +29,7 @@
 from opentelemetry import metrics
 from opentelemetry.sdk.metrics import MeterProvider
 from opentelemetry.sdk.metrics.export import PeriodicExportingMetricReader
-from opentelemetry.exporter.otlp.proto.grpc.metric_exporter import OTLPMetricExporter
+from opentelemetry.exporter.otlp.proto.http.metric_exporter import OTLPMetricExporter
 
 # Initialize metering and an exporter that can send data to an OTLP endpoint
 # SELECT count(`http.server.active_requests`) FROM Metric FACET `service.name` TIMESERIES
@@ -46,7 +46,7 @@
 from opentelemetry import _logs
 from opentelemetry.sdk._logs import LoggerProvider, LoggingHandler
 from opentelemetry.sdk._logs.export import BatchLogRecordProcessor
-from opentelemetry.exporter.otlp.proto.grpc._log_exporter import OTLPLogExporter
+from opentelemetry.exporter.otlp.proto.http._log_exporter import OTLPLogExporter
 
 # Initialize logging and an exporter that can send data to an OTLP endpoint by attaching OTLP handler to root logger
 # SELECT * FROM Log WHERE instrumentation.provider='opentelemetry'