use namespace for ca and rename CaState to ca::RequestState

Change-Id: I2250bf7fb68503465dae18e16dc3c512fe809037
diff --git a/tests/unit-tests/challenge-email.t.cpp b/tests/unit-tests/challenge-email.t.cpp
index 3435a00..b319040 100644
--- a/tests/unit-tests/challenge-email.t.cpp
+++ b/tests/unit-tests/challenge-email.t.cpp
@@ -46,7 +46,7 @@
   auto key = identity.getDefaultKey();
   auto cert = key.getDefaultCertificate();
   RequestID requestId = {1,2,3,4,5,6,7,8};
-  CaState request(Name("/ndn/site1"), requestId, RequestType::NEW, Status::BEFORE_CHALLENGE, cert, makeEmptyBlock(ndn::tlv::ContentType_Key));
+  ca::RequestState request(Name("/ndn/site1"), requestId, RequestType::NEW, Status::BEFORE_CHALLENGE, cert, makeEmptyBlock(ndn::tlv::ContentType_Key));
 
   Block paramTLV = makeEmptyBlock(tlv::EncryptedPayload);
   paramTLV.push_back(makeStringBlock(tlv::ParameterKey, ChallengeEmail::PARAMETER_KEY_EMAIL));
@@ -96,7 +96,7 @@
   auto key = identity.getDefaultKey();
   auto cert = key.getDefaultCertificate();
   RequestID requestId = {1,2,3,4,5,6,7,8};
-  CaState request(Name("/ndn/site1"), requestId, RequestType::NEW, Status::BEFORE_CHALLENGE, cert, makeEmptyBlock(ndn::tlv::ContentType_Key));
+  ca::RequestState request(Name("/ndn/site1"), requestId, RequestType::NEW, Status::BEFORE_CHALLENGE, cert, makeEmptyBlock(ndn::tlv::ContentType_Key));
 
   Block paramTLV = makeEmptyBlock(tlv::EncryptedPayload);
   paramTLV.push_back(makeStringBlock(tlv::ParameterKey, ChallengeEmail::PARAMETER_KEY_EMAIL));
@@ -118,7 +118,7 @@
   JsonSection json;
   json.put(ChallengeEmail::PARAMETER_KEY_CODE, "4567");
   RequestID requestId = {1,2,3,4,5,6,7,8};
-  CaState request(Name("/ndn/site1"), requestId, RequestType::NEW, Status::CHALLENGE, cert,
+  ca::RequestState request(Name("/ndn/site1"), requestId, RequestType::NEW, Status::CHALLENGE, cert,
                   "email", ChallengeEmail::NEED_CODE, time::system_clock::now(),
                   3, time::seconds(3600), std::move(json), makeEmptyBlock(ndn::tlv::ContentType_Key), 0);
 
@@ -141,7 +141,7 @@
   JsonSection json;
   json.put(ChallengeEmail::PARAMETER_KEY_CODE, "4567");
   RequestID requestId = {1,2,3,4,5,6,7,8};
-  CaState request(Name("/ndn/site1"), requestId, RequestType::NEW, Status::CHALLENGE, cert,
+  ca::RequestState request(Name("/ndn/site1"), requestId, RequestType::NEW, Status::CHALLENGE, cert,
                   "email", ChallengeEmail::NEED_CODE, time::system_clock::now(),
                   3, time::seconds(3600), std::move(json), makeEmptyBlock(ndn::tlv::ContentType_Key), 0);