Change get_execution_context to work better in the common cases

Currently, there is not enough reliable information available
to accurately determine the execution environment and
execution platform. Until that is available, change
get_execution_context to provide better values for
the most common cases.

terra_notebook_utils/utils.py

@@ -72,16 +72,19 @@ def is_notebook() -> bool:
 def get_execution_context() -> ExecutionContext:
     """
     Identify information about the context in which terra-notebook-utils is executing.
-    Currently, this determination is made based on the presence and value of the WORKSPACE_BUCKET.
-    Other/improved means may be identified in the future.
+    TODO Improve the information available and algorithm to identify these values accurately!
     """
-    execution_environment = ExecutionEnvironment.OTHER
+    # Workaround current insufficient information by assuming
+    # the execution environment is Terra, as that is the most
+    # common and important case.
+    # execution_environment = ExecutionEnvironment.OTHER
+    execution_environment = ExecutionEnvironment.TERRA_WORKSPACE
     execution_platform = ExecutionPlatform.UNKNOWN
     workspace_bucket = os.environ.get('WORKSPACE_BUCKET', None)
-    if workspace_bucket:
-        execution_environment = ExecutionEnvironment.TERRA_WORKSPACE
-        if workspace_bucket.startswith("gs://"):
-            execution_platform = ExecutionPlatform.GOOGLE
-        elif workspace_bucket.startswith("https://"):
-            execution_platform = ExecutionPlatform.AZURE
+    if workspace_bucket and workspace_bucket.startswith("gs://"):
+        execution_platform = ExecutionPlatform.GOOGLE
+    else:
+        # Workaround current insufficient information by assuming
+        # the execution platform is not Google then it is Azure.
+        execution_platform = ExecutionPlatform.AZURE
     return ExecutionContext(execution_environment, execution_platform)