ts_51_011, utils: fix Access Technology Identifier coding

When the Access Technology Identifier encoder sets the bits for E-UTRAN
it does not respect that bit "100" is also a valid bit combination that
encodes E-UTRAN WB-S1 and E-UTRAN NB-S1. Lets encode this bit
combination if the user is just specifying "E-UTRAN" without further
spefication of WB or NB.

The decoder only looks at bit 14 and decodes "1xx" always to "E-UTRAN".
This is not specific enough. Lets make sure that the decoder is
complementary to the encoder.

Change-Id: Ibfe8883a05f9ad6988d8e212cb9a598229954296
Related: OS#4963
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 558b5e7..0fb502c 100755
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -93,7 +93,7 @@
 		self.assertEqual(utils.dec_act("0010"), ["cdma2000 1xRTT"])
 
 	def testDecAct_allSet(self):
-		self.assertEqual(utils.dec_act("ffff"), ["UTRAN", "E-UTRAN", "GSM", "GSM COMPACT", "cdma2000 HRPD", "cdma2000 1xRTT"])
+		self.assertEqual(utils.dec_act("ffff"), ["UTRAN", "E-UTRAN WB-S1", "E-UTRAN NB-S1", "GSM", "GSM COMPACT", "cdma2000 HRPD", "cdma2000 1xRTT"])
 
 	def testDecxPlmn_w_act(self):
 		expected = {'mcc': '295', 'mnc': '10', 'act': ["UTRAN"]}