Add test case about RANAP MaxBitrate encoding

Our version of asn1c/libasn1c used to have an INTEGER encoding but,
where the encoding of integers of > 2 bytes length was broken.

Add a test case to what we expect with the updated/fixed libasn1c.

If your compilation breaks, please upate to libasn1c with related
fix commited a few minutes ago.
diff --git a/src/tests/test-ranap.ok b/src/tests/test-ranap.ok
index 3e9bcda..430535c 100644
--- a/src/tests/test-ranap.ok
+++ b/src/tests/test-ranap.ok
@@ -1,3 +1,14 @@
+Encoded MaxBitRate 1 to 00 00 
+Encoded MaxBitRate 2 to 00 01 
+Encoded MaxBitRate 3 to 00 02 
+Encoded MaxBitRate 255 to 00 fe 
+Encoded MaxBitRate 256 to 00 ff 
+Encoded MaxBitRate 257 to 40 01 00 
+Encoded MaxBitRate 64000 to 40 f9 ff 
+Encoded MaxBitRate 65535 to 40 ff fe 
+Encoded MaxBitRate 65536 to 40 ff ff 
+Encoded MaxBitRate 65537 to 80 01 00 00 
+Encoded MaxBitRate 16000000 to 80 f4 23 ff 
 
 ==> DIRECT TRANSFER
 <RANAP_IE>
@@ -77,7 +88,7 @@
     <firstValue>
         38 02 D8 01 2F A7 20 2F A8 00 00 F4 4C 08 0A 02 
         80 00 51 40 00 27 20 28 14 00 67 40 00 00 22 28 
-        14 00 3C 40 00 00 00 50 3D 02 00 02 0D C0 35 00 
+        14 00 3C 40 00 00 00 50 3D 02 02 00 0D C0 35 00 
         01 0A 0B 0C 0D 40 00 00 00 01
     </firstValue>
     <secondCriticality><ignore/></secondCriticality>
@@ -90,11 +101,11 @@
         00 00 01 00 35 00 3A 38 02 D8 01 2F A7 20 2F A8 
         00 00 F4 4C 08 0A 02 80 00 51 40 00 27 20 28 14 
         00 67 40 00 00 22 28 14 00 3C 40 00 00 00 50 3D 
-        02 00 02 0D C0 35 00 01 0A 0B 0C 0D 40 00 00 00 
+        02 02 00 0D C0 35 00 01 0A 0B 0C 0D 40 00 00 00 
         01 40 01 00
     </value>
 </RANAP_IE>
-00 00 00 4b 00 00 01 00 36 40 44 00 00 01 00 35 00 3a 38 02 d8 01 2f a7 20 2f a8 00 00 f4 4c 08 0a 02 80 00 51 40 00 27 20 28 14 00 67 40 00 00 22 28 14 00 3c 40 00 00 00 50 3d 02 00 02 0d c0 35 00 01 0a 0b 0c 0d 40 00 00 00 01 40 01 00 
+00 00 00 4b 00 00 01 00 36 40 44 00 00 01 00 35 00 3a 38 02 d8 01 2f a7 20 2f a8 00 00 f4 4c 08 0a 02 80 00 51 40 00 27 20 28 14 00 67 40 00 00 22 28 14 00 3c 40 00 00 00 50 3d 02 02 00 0d c0 35 00 01 0a 0b 0c 0d 40 00 00 00 01 40 01 00 
 
 ==> RAB ASSIGNMENT COMMAND (DATA)
 <RANAP_ProtocolIE-FieldPair>
@@ -102,7 +113,7 @@
     <firstCriticality><reject/></firstCriticality>
     <firstValue>
         38 04 10 DE 18 69 FF 80 0C 34 FF 00 1F 40 08 06 
-        08 9E 00 00 04 1B 80 35 00 01 1A 1B 1C 1D 00 11 
+        08 9E 00 04 00 1B 80 35 00 01 1A 1B 1C 1D 00 11 
         22 33 44
     </firstValue>
     <secondCriticality><ignore/></secondCriticality>
@@ -113,12 +124,12 @@
     <criticality><ignore/></criticality>
     <value>
         00 00 01 00 35 00 23 38 04 10 DE 18 69 FF 80 0C 
-        34 FF 00 1F 40 08 06 08 9E 00 00 04 1B 80 35 00 
+        34 FF 00 1F 40 08 06 08 9E 00 04 00 1B 80 35 00 
         01 1A 1B 1C 1D 00 11 22 33 44 40 06 78 1C 00 00 
         00 00
     </value>
 </RANAP_IE>
-00 00 00 39 00 00 01 00 36 40 32 00 00 01 00 35 00 23 38 04 10 de 18 69 ff 80 0c 34 ff 00 1f 40 08 06 08 9e 00 00 04 1b 80 35 00 01 1a 1b 1c 1d 00 11 22 33 44 40 06 78 1c 00 00 00 00 
+00 00 00 39 00 00 01 00 36 40 32 00 00 01 00 35 00 23 38 04 10 de 18 69 ff 80 0c 34 ff 00 1f 40 08 06 08 9e 00 04 00 1b 80 35 00 01 1a 1b 1c 1d 00 11 22 33 44 40 06 78 1c 00 00 00 00 
 
 ==> RESET CMD
 <RANAP_IE>