added __init__.py for tasks; fixed imports

official/vision/beta/projects/panoptic_maskrcnn/__init__.py

@@ -25,3 +25,6 @@
 # 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.
+
+from official.vision.beta.projects.panoptic_maskrcnn import configs
+from official.vision.beta.projects.panoptic_maskrcnn import tasks
\ No newline at end of file

official/vision/beta/projects/panoptic_maskrcnn/tasks/__init__.py

+# Copyright 2021 The TensorFlow Authors. All Rights Reserved.
+#
+# 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.
+
+# Lint as: python3
+"""Tasks package definition."""
+
+from official.vision.beta.projects.panoptic_maskrcnn.tasks import panoptic_maskrcnn
\ No newline at end of file