Use relative imports.

Making `bionicbb` its own package required `PYTHONPATH=..`, which we
don't want. Just use a relative import instead.

Change-Id: I59b9852522118ece89829288a4921902e756e4aa
diff --git a/tools/bionicbb/__init__.py b/tools/bionicbb/__init__.py
deleted file mode 100644
index e69de29..0000000
--- a/tools/bionicbb/__init__.py
+++ /dev/null
diff --git a/tools/bionicbb/build_listener.py b/tools/bionicbb/build_listener.py
index 3a0032d..b63c18d 100644
--- a/tools/bionicbb/build_listener.py
+++ b/tools/bionicbb/build_listener.py
@@ -5,7 +5,7 @@
 import requests
 import termcolor
 
-import bionicbb.gerrit
+import gerrit
 
 from flask import Flask, request
 app = Flask(__name__)
@@ -79,7 +79,7 @@
   patch_set = revision_info['patchset']
 
   bb_email = 'bionicbb@android.com'
-  labels = bionicbb.gerrit.get_labels(change_id, patch_set)
+  labels = gerrit.get_labels(change_id, patch_set)
   if bb_email in labels['Verified']:
     bb_review = labels['Verified'][bb_email]
   else:
diff --git a/tools/bionicbb/gmail_listener.py b/tools/bionicbb/gmail_listener.py
index 795efd8..95ae3ae 100644
--- a/tools/bionicbb/gmail_listener.py
+++ b/tools/bionicbb/gmail_listener.py
@@ -15,8 +15,8 @@
 
 import apiclient.errors
 
-import bionicbb.config
-import bionicbb.gerrit
+import config
+import gerrit
 
 
 class GmailError(RuntimeError):
@@ -48,8 +48,7 @@
   STORAGE = Storage('oauth.storage')
 
   # Start the OAuth flow to retrieve credentials
-  flow = flow_from_clientsecrets(bionicbb.config.client_secret_file,
-                                 scope=OAUTH_SCOPE)
+  flow = flow_from_clientsecrets(config.client_secret_file, scope=OAUTH_SCOPE)
   http = httplib2.Http()
 
   # Try to retrieve credentials from storage or run the flow to generate them
@@ -92,9 +91,9 @@
 
 
 def clean_project(gerrit_info, dry_run):
-  username = bionicbb.config.jenkins_credentials['username']
-  password = bionicbb.config.jenkins_credentials['password']
-  jenkins_url = bionicbb.config.jenkins_url
+  username = config.jenkins_credentials['username']
+  password = config.jenkins_credentials['password']
+  jenkins_url = config.jenkins_url
   jenkins = jenkinsapi.api.Jenkins(jenkins_url, username, password)
 
   build = 'clean-bionic-presubmit'
@@ -127,9 +126,9 @@
       'platform/external/compiler-rt': 'bionic-presubmit',
   }
 
-  username = bionicbb.config.jenkins_credentials['username']
-  password = bionicbb.config.jenkins_credentials['password']
-  jenkins_url = bionicbb.config.jenkins_url
+  username = config.jenkins_credentials['username']
+  password = config.jenkins_credentials['password']
+  jenkins_url = config.jenkins_url
   jenkins = jenkinsapi.api.Jenkins(jenkins_url, username, password)
 
   project = gerrit_info['Project']
@@ -151,8 +150,8 @@
           project_path)
       return False
     try:
-      ref = bionicbb.gerrit.ref_for_change(change_id)
-    except bionicbb.gerrit.GerritError as ex:
+      ref = gerrit.ref_for_change(change_id)
+    except gerrit.GerritError as ex:
       print '{}({}): {} {}'.format(
           termcolor.colored('GERRIT-ERROR', 'red'),
           ex.code,
@@ -197,7 +196,7 @@
       'changeid': gerrit_info['Change-Id'],
       'patchset': gerrit_info['PatchSet']
   }
-  url = '{}/{}'.format(bionicbb.config.build_listener_url, 'drop-rejection')
+  url = '{}/{}'.format(config.build_listener_url, 'drop-rejection')
   headers = {'Content-Type': 'application/json;charset=UTF-8'}
   if not dry_run:
     try: