Fix python deprecation warnings

indra/lib/python/indra/util/llmanifest.py

@@ -575,7 +575,7 @@ def replace_in(self, src, dst=None, searchdict={}):
         if dst == None:
             dst = src
         # read src
-        f = open(self.src_path_of(src), "rU")
+        f = open(self.src_path_of(src), "r")
         contents = f.read()
         f.close()
         # apply dict replacements

indra/llcorehttp/tests/test_llcorehttp_peer.py

 #!/usr/bin/env python3
 """\
-@file   test_llsdmessage_peer.py
+@file   test_llcorehttp_peer.py
 @author Nat Goodspeed
 @date   2008-10-09
 @brief  This script asynchronously runs the executable (with args) specified on

indra/newview/viewer_manifest.py

@@ -272,7 +272,7 @@ def icon_path(self):
 
     def extract_names(self,src):
         try:
-            contrib_file = open(src,'rU')
+            contrib_file = open(src,'r')
         except IOError:
             print("Failed to open '%s'" % src)
             raise