Minor: reorganise the test directory to match the src directory

tests/contracts/CashTests.kt

@@ -2,8 +2,8 @@ import contracts.Cash
 import contracts.DummyContract
 import contracts.InsufficientBalanceException
 import core.*
+import core.testutils.*
 import org.junit.Test
-import testutils.*
 import java.security.PublicKey
 import java.util.*
 import kotlin.test.assertEquals

tests/contracts/CommercialPaperTests.kt

@@ -4,8 +4,8 @@ import core.DOLLARS
 import core.InstitutionReference
 import core.OpaqueBytes
 import core.days
+import core.testutils.*
 import org.junit.Test
-import testutils.*
 
 // TODO: Finish this off.
 

tests/core/serialization/KryoTests.kt

@@ -1,7 +1,6 @@
-package serialization
+package core.serialization
 
 import com.esotericsoftware.kryo.Kryo
-import core.serialization.*
 import org.junit.Test
 import java.time.Instant
 import kotlin.test.assertEquals

tests/core/serialization/TransactionSerializationTests.kt

@@ -1,12 +1,12 @@
-package serialization
+package core.serialization
 
 import contracts.Cash
 import core.*
+import core.testutils.DUMMY_PUBKEY_1
+import core.testutils.MINI_CORP
+import core.testutils.TestUtils
 import org.junit.Before
 import org.junit.Test
-import testutils.DUMMY_PUBKEY_1
-import testutils.MINI_CORP
-import testutils.TestUtils
 import java.security.SignatureException
 import kotlin.test.assertFailsWith
 

tests/core/testutils/TestUtils.kt

@@ -1,4 +1,4 @@
-package testutils
+package core.testutils
 
 import contracts.*
 import core.*