Fix post-merge conflict in OpenTelemetryRule. (#2014)

Author: Anuraag Agrawal

sdk/testing/src/main/java/io/opentelemetry/sdk/testing/junit4/OpenTelemetryRule.java

@@ -8,8 +8,8 @@
 import io.opentelemetry.api.OpenTelemetry;
 import io.opentelemetry.api.trace.propagation.HttpTraceContext;
 import io.opentelemetry.context.propagation.DefaultContextPropagators;
-import io.opentelemetry.exporter.inmemory.InMemorySpanExporter;
 import io.opentelemetry.sdk.OpenTelemetrySdk;
+import io.opentelemetry.sdk.testing.exporter.InMemorySpanExporter;
 import io.opentelemetry.sdk.trace.TracerSdkManagement;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;