Debugging and test fixes for CI

test_compression_br worked on my box under python 3.6. In CI it worked
in 3.4 but failed on all other versions 3.6,7,8,9,dev. Error:

            json_dict = json.loads(b2s(brotli.decompress(f.content)))
E           brotli.error: BrotliDecompress failed

so print f.content.

Also restructured the code to not check for type of f.content. Instead
try json.loads(f.content) and if we get an exception try decompressing. Use
this for br and zstd tests.

Author: rouilj

test/test_liveserver.py

@@ -529,10 +529,13 @@ def test_compression_br(self):
         }'''
         content = json.loads(content_str)
 
+        print(f.content)
+        print(type(f.content))
 
-        if (type("") == type(f.content)):
+        try:
             json_dict = json.loads(f.content)
-        else:
+        except (ValueError):
+            # Handle error from trying to load compressed data
             json_dict = json.loads(b2s(brotli.decompress(f.content)))
 
         # etag wil not match, creation date different
@@ -673,9 +676,12 @@ def test_compression_zstd(self):
         content = json.loads(content_str)
 
 
-        if (type("") == type(f.content)):
+        try:
             json_dict = json.loads(f.content)
-        else:
+        except (ValueError, UnicodeDecodeError):
+            # ValueError - raised by loads on compressed content python2
+            # UnicodeDecodeError - raised by loads on compressed content
+            #    python3
             json_dict = json.loads(b2s(zstd.decompress(f.content)))
 
         # etag wil not match, creation date different