Automated Paсkage versions update for tags

Module repos.py
 - ReposInfo(), walks mirror using HTTP and builds
   all repos map available
 - RepoManager(), using repos map builds package versions map
   either for specific tags or for all of them

Fixes:
 - Progress class clears line remainder on change

Utils:
 - Download GZ file into memory
 - TGZ file interface, CRU (no deletion)

Change-Id: Ifdb37aa4b68fb25f642b2089cf16cd242ed25a0b
Related-PROD: PROD-28199
diff --git a/cfg_checker/common/file_utils.py b/cfg_checker/common/file_utils.py
index d508121..684fc30 100644
--- a/cfg_checker/common/file_utils.py
+++ b/cfg_checker/common/file_utils.py
@@ -82,3 +82,14 @@
     }
 
     return _dict
+
+
+def get_gzipped_file(url):
+    # imports
+    from io import BytesIO
+    from requests import get
+    import gzip
+    # download a file
+    _bytes = BytesIO(get(url).content)
+    with gzip.GzipFile(fileobj=_bytes) as gz:
+        return gz.read()