Add tests for deserialization

...assel/protocol/primitive/serializer/BoolSerializerTest.kt

...protocol/primitive/serializer/BufferInfoSerializerTest.kt

.../protocol/primitive/serializer/ByteArraySerializerTest.kt

...assel/protocol/primitive/serializer/ByteSerializerTest.kt

...assel/protocol/primitive/serializer/CharSerializerTest.kt

...l/protocol/primitive/serializer/DateTimeSerializerTest.kt

...uassel/protocol/primitive/serializer/IntSerializerTest.kt

...assel/protocol/primitive/serializer/LongSerializerTest.kt

...el/protocol/primitive/serializer/MessageSerializerTest.kt

...ssel/protocol/primitive/serializer/ShortSerializerTest.kt

...sel/protocol/primitive/serializer/StringSerializerTest.kt

...test/java/de/kuschku/libquassel/util/SerializerHelpers.kt