[Findit & Predator] Code reorg of Findit.

appengine/predator/analysis/old_init.py

+import os
+import sys
+
+# The main reason for this hack is: we want this module to be self-contained.
+# And due to testing setup in the infra repo, appengine/cr_culprit_finder would
+# be the current working directory during test execution instead of this
+# directory. But we can't import from appengine/cr_culprit_finder, because the
+# root directory for app deployment is appengine/cr_culprit_finder/service/*
+# instead.
+#
+# As a side effect, clients importing this module via symbolic links don't have
+# to explicitly add this directory to the PYTHONPATH or sys.path, because it is
+# implicitly done here.
+#
+# Add to sys.path this directory so that unittests and deployed app won't
+# complain about modules not found.
+_THIS_DIR = os.path.dirname(os.path.abspath(__file__))
+if _THIS_DIR not in sys.path:
+  sys.path.insert(0, _THIS_DIR)