Fixed a bug in ShaperNetDeviceFace

Fixed a bug in determining the actual shaping rate between minBitRate and maxBitRate. Also made m_outInterestSize/m_inInterestSize/m_outContentSize/m_inContentSize double to avoid rounding error.
Refined the test cases

Changed the traces we collect & increased the simulation duration to 60s.
Fixed a bug in ndn-cc-3

Forgot to SetInRate() for ShaperNetDeviceFace in case of asymmetric link.