crowdin: Use environment variables for api_key & base_path

Example:
export CM_CROWDIN_API_KEY=your_api_key
export CM_AOSP_CROWDIN_API_KEY=your_aosp_api_key
export CM_CROWDIN_BASE_PATH=/mnt/cm_root

base_path is the folder that contains branch subfolders of CM trees
(cm-11.0, cm-12.0, cm-12.1)
For example, the cm-11.0 tree would be at /mnt/cm_root/cm-11.0

Change-Id: I7ca3f3cf2fe38bdedf79be8d2a9ede90ebf5cd2b
diff --git a/crowdin_sync.py b/crowdin_sync.py
index 04cf3d5..baa18e3 100755
--- a/crowdin_sync.py
+++ b/crowdin_sync.py
@@ -147,9 +147,7 @@
 
 
 def check_files(branch):
-    files = ['crowdin/config.yaml',
-             'crowdin/extra_packages_%s.xml' % branch,
-             'crowdin/config_aosp.yaml',
+    files = ['crowdin/extra_packages_%s.xml' % branch,
              'crowdin/crowdin_%s.yaml' % branch,
              'crowdin/crowdin_%s_aosp.yaml' % branch
              ]
@@ -171,17 +169,13 @@
     print('\nUploading Crowdin source translations (AOSP supported languages)')
 
     # Execute 'crowdin-cli upload sources' and show output
-    check_run(['crowdin-cli',
-               '--config=crowdin/crowdin_%s.yaml' % branch,
-               '--identity=crowdin/config.yaml',
+    check_run(['crowdin-cli', '--config=crowdin/crowdin_%s.yaml' % branch,
                'upload', 'sources'])
 
     print('\nUploading Crowdin source translations '
           '(non-AOSP supported languages)')
     # Execute 'crowdin-cli upload sources' and show output
-    check_run(['crowdin-cli',
-               '--config=crowdin/crowdin_%s_aosp.yaml' % branch,
-               '--identity=crowdin/config_aosp.yaml',
+    check_run(['crowdin-cli', '--config=crowdin/crowdin_%s_aosp.yaml' % branch,
                'upload', 'sources'])
 
 
@@ -193,16 +187,12 @@
 
     print('\nDownloading Crowdin translations (AOSP supported languages)')
     # Execute 'crowdin-cli download' and show output
-    check_run(['crowdin-cli',
-               '--config=crowdin/crowdin_%s.yaml' % branch,
-               '--identity=crowdin/config.yaml',
+    check_run(['crowdin-cli', '--config=crowdin/crowdin_%s.yaml' % branch,
                'download', '--ignore-match'])
 
     print('\nDownloading Crowdin translations (non-AOSP supported languages)')
     # Execute 'crowdin-cli download' and show output
-    check_run(['crowdin-cli',
-               '--config=crowdin/crowdin_%s_aosp.yaml' % branch,
-               '--identity=crowdin/config_aosp.yaml',
+    check_run(['crowdin-cli', '--config=crowdin/crowdin_%s_aosp.yaml' % branch,
                'download', '--ignore-match'])
 
     print('\nSTEP 3: Remove useless empty translations')
@@ -230,12 +220,11 @@
     # Get all files that Crowdin pushed
     paths = []
     files = [
-        ('crowdin/crowdin_%s.yaml' % branch, 'crowdin/config.yaml'),
-        ('crowdin/crowdin_%s_aosp.yaml' % branch, 'crowdin/config_aosp.yaml')
+        ('crowdin/crowdin_%s.yaml' % branch),
+        ('crowdin/crowdin_%s_aosp.yaml' % branch)
     ]
-    for c, i in files:
-        cmd = ['crowdin-cli', '--config=%s' % c, '--identity=%s' % i,
-               'list', 'sources']
+    for c in files:
+        cmd = ['crowdin-cli', '--config=%s' % c, 'list', 'sources']
         comm, ret = run_subprocess(cmd)
         if ret != 0:
             sys.exit(ret)