fix: Fix Backward compatibility by using deprecated classes for OCSpan and Tracer

Author: Abhi347

src/main/java/com/spotify/github/opencensus/OpenCensusSpan.java

@@ -0,0 +1,38 @@
+/*-
+ * -\-\-
+ * github-api
+ * --
+ * Copyright (C) 2016 - 2021 Spotify AB
+ * --
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * -/-/-
+ */
+
+package com.spotify.github.opencensus;
+
+import io.opencensus.trace.Span;
+
+/**
+ * OpenCensusSpan is a wrapper around OpenCensus Span. This class is kept for backward
+ * compatibility.
+ *
+ * @deprecated This class has been moved to the package com.spotify.github.tracing.opencensus.
+ *             Please use com.spotify.github.tracing.opencensus.OpenCensusSpan instead.
+ */
+@Deprecated
+public class OpenCensusSpan extends com.spotify.github.tracing.opencensus.OpenCensusSpan {
+  public OpenCensusSpan(final Span span) {
+    super(span);
+  }
+  // This class is kept for backward compatibility
+}

src/main/java/com/spotify/github/opencensus/OpenCensusTracer.java

@@ -0,0 +1,33 @@
+/*-
+ * -\-\-
+ * github-api
+ * --
+ * Copyright (C) 2016 - 2021 Spotify AB
+ * --
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * -/-/-
+ */
+
+package com.spotify.github.opencensus;
+
+/**
+ * OpenCensusTracer is a wrapper around OpenCensus Tracer. This class is kept for backward
+ * compatibility.
+ *
+ * @deprecated This class has been moved to the package com.spotify.github.tracing.opencensus.
+ *             Please use com.spotify.github.tracing.opencensus.OpenCensusTracer instead.
+ */
+@Deprecated
+public class OpenCensusTracer extends com.spotify.github.tracing.opencensus.OpenCensusTracer {
+  // This class is kept for backward compatibility
+}