Fix some file resource leaks

I.e., files left open when the opening function exits. This is
a PyDebug warning.

svn: r21149

gramps/cli/clidbman.py

@@ -159,6 +159,7 @@ class CLIDbManager(object):
         try:
             dbmap1.open(fname, META, db.DB_HASH, db.DB_RDONLY)
         except:
+            env.close()
             return "Unknown", "Unknown"
         version = dbmap1.get('version', default=None)
         dbmap1.close()
@@ -218,6 +219,7 @@ class CLIDbManager(object):
                 if os.path.isfile(path_name):
                     file = open(path_name)
                     name = file.readline().strip()
+                    file.close()
 
                     (tval, last) = time_val(dirpath)
                     (enable, stock_id) = self.icon_values(dirpath, self.active, 

gramps/gen/plug/_pluginreg.py

@@ -36,7 +36,7 @@ import os
 import sys
 import re
 import traceback
-import codecs
+import io
 
 #-------------------------------------------------------------------------
 #
@@ -1093,13 +1093,16 @@ class PluginRegister(object):
             full_filename = os.path.join(dir, filename)
             if sys.version_info[0] < 3:
                 full_filename = full_filename.encode(glocale.getfilesystemencoding())
+                fd = open(full_filename, "r")
+            else:
+                fd = io.open(full_filename, 'r', encoding = 'utf-8')
+            stream = fd.read()
+            fd.close()
             local_gettext = glocale.get_addon_translator(full_filename).gettext
             try:
                 #execfile(full_filename,
-                exec(compile(codecs.open(full_filename, 'r', 'utf-8').read(),
-                             full_filename, 'exec'),
-                     make_environment(_=local_gettext),
-                         {})
+                exec (compile(stream, full_filename, 'exec'),
+                      make_environment(_=local_gettext), {})
             except ValueError as msg:
                 print(_('ERROR: Failed reading plugin registration %(filename)s') % \
                             {'filename' : filename})