possible fix for issue savonrb#29 (default to utf to wsse auth)

lib/savon.rb

@@ -4,7 +4,7 @@ module Savon
   SOAPVersions = [1, 2]
 
   # SOAP xs:dateTime format.
-  SOAPDateTimeFormat = "%Y-%m-%dT%H:%M:%S"
+  SOAPDateTimeFormat = "%Y-%m-%dT%H:%M:%SZ"
 
   # SOAP xs:dateTime Regexp.
   SOAPDateTimeRegexp = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}/

spec/savon/core_ext/datetime_spec.rb

@@ -5,7 +5,7 @@
   describe "to_soap_value" do
     it "returns an xs:dateTime compliant String" do
       DateTime.new(2012, 03, 22, 16, 22, 33).to_soap_value.
-        should == "2012-03-22T16:22:33"
+        should == "2012-03-22T16:22:33Z"
     end
   end
 

spec/savon/core_ext/hash_spec.rb

@@ -53,7 +53,7 @@
 
     it "converts DateTime objects to xs:dateTime compliant Strings" do
       { :before => DateTime.new(2012, 03, 22, 16, 22, 33) }.to_soap_xml.
-        should == "<before>" << "2012-03-22T16:22:33" << "</before>"
+        should == "<before>" << "2012-03-22T16:22:33Z" << "</before>"
     end
 
     it "converts Objects responding to to_datetime to xs:dateTime compliant Strings" do
@@ -63,7 +63,7 @@ def singleton.to_datetime
       end
 
       { :before => singleton }.to_soap_xml.
-        should == "<before>" << "2012-03-22T16:22:33" << "</before>"
+        should == "<before>" << "2012-03-22T16:22:33Z" << "</before>"
     end
 
     it "calls to_s on Strings even if they respond to to_datetime" do

spec/savon/core_ext/object_spec.rb

@@ -29,7 +29,7 @@ def singleton.to_datetime
         DateTime.new(2012, 03, 22, 16, 22, 33)
       end
 
-      singleton.to_soap_value.should == "2012-03-22T16:22:33"
+      singleton.to_soap_value.should == "2012-03-22T16:22:33Z"
     end
 
     it "calls to_s unless the Object responds to to_datetime" do

spec/savon/savon_spec.rb

@@ -12,7 +12,7 @@
     Savon::SOAPDateTimeFormat.should_not be_empty
 
     DateTime.new(2012, 03, 22, 16, 22, 33).strftime(Savon::SOAPDateTimeFormat).
-      should == "2012-03-22T16:22:33"
+      should == "2012-03-22T16:22:33Z"
   end
 
   it "contains a Regexp matching the xs:dateTime format" do