message: Implemented Request tests.
diff: <Compile Include="PoolUtils.cs" />
  <Compile Include="StorageUtils.cs" />
  <Compile Include="Wrapper\AgentTests\AgentTest.cs" />
  + <Compile Include="Wrapper\LedgerTests\RequestTest.cs" />
  <Compile Include="Wrapper\LedgerTests\NymRequestTest.cs" />
  <Compile Include="Wrapper\LedgerTests\NodeRequestTest.cs" />
  <Compile Include="Wrapper\LedgerTests\GetTxnRequestTest.cs" />
  