Aishwarya Kendle

Results 5 issues of Aishwarya Kendle

The openpyxl module being used was quite old, which created conflicts with other packages. Updated it to version >=2.6.1

![Screenshot from 2019-10-16 21-16-13](https://user-images.githubusercontent.com/47445489/66935970-8fb16000-f05a-11e9-8397-de5456c17a80.png)

Added the tests under https://github.com/rainprotocol/rain-protocol/pull/515