add a function to find package.json..
add a function to find package.json..

.. for the given azure nodejs package and return the name and version of
the package obtained from reading its package.json

xingwu1/azure-sdk-for-node,Azure/azure-sdk-for-node,amarzavery/azure-sdk-for-node,AuxMon/azure-sdk-for-node,Azure/azure-sdk-for-node,xingwu1/azure-sdk-for-node,AutorestCI/azure-sdk-for-node,lmazuel/azure-sdk-for-node,begoldsm/azure-sdk-for-node,Azure/azure-sdk-for-node,xingwu1/azure-sdk-for-node,lmazuel/azure-sdk-for-node,begoldsm/azure-sdk-for-node,amarzavery/azure-sdk-for-node,AutorestCI/azure-sdk-for-node,AuxMon/azure-sdk-for-node