email_template: cleanup the startup warning lines.

Multiple coding malpractices (I can't name them errors, yet) were in those
lines:
 - they used the netsvc.Logger() interface, which is deprecated
 - they wrapped too much (we're not COBOL)
 - they used capital letters for an object
 - they defined a logger object that would live throughout the module
   life, although it would only be useful for startup
 - they used the gettext function, although there is absolutely no context
   around to provide a language.

bzr revid: p_christ@hol.gr-20101116145144-kwf7612bz0k1xzs2

addons/email_template/email_template.py

@@ -23,10 +23,9 @@
 import base64
 import random
 import netsvc
+import logging
 import re
 
-LOGGER = netsvc.Logger()
-
 TEMPLATE_ENGINES = []
 
 from osv import osv, fields
@@ -35,12 +34,9 @@ from tools.translate import _
 try:
     from mako.template import Template as MakoTemplate
     TEMPLATE_ENGINES.append(('mako', 'Mako Templates'))
-except:
-    LOGGER.notifyChannel(
-         _("Email Template"),
-         netsvc.LOG_WARNING,
-         _("Mako templates not installed")
-    )
+except ImportError:
+    logging.getLogger('init').warning("module email_template: Mako templates not installed")
+    
 try:
     from django.template import Context, Template as DjangoTemplate
     #Workaround for bug:
@@ -49,12 +45,8 @@ try:
     settings.configure()
     #Workaround ends
     TEMPLATE_ENGINES.append(('django', 'Django Template'))
-except:
-    LOGGER.notifyChannel(
-         _("Email Template"),
-         netsvc.LOG_WARNING,
-         _("Django templates not installed")
-    )
+except ImportError:
+    logging.getLogger('init').warning("module email_template: Django templates not installed")
 
 import tools
 import pooler