Fix missing ARC_PATH import in adapter_test.py (#832)

Author: calvinp0

arc/job/adapter_test.py

@@ -15,7 +15,7 @@
 
 import pandas as pd
 
-from arc.common import ARC_TESTING_PATH
+from arc.common import ARC_PATH, ARC_TESTING_PATH
 from arc.imports import settings
 from arc.job.adapter import DataPoint, JobEnum, JobTypeEnum, JobExecutionTypeEnum
 from arc.job.adapters.gaussian import GaussianAdapter