Generic implementation of InsertIntoTable function from testing/commons.*

[sachinpro]

The current implementation assumes that the schema of the table follows StdRow. There can be a few enhancements to the implementation:

1. Currently StdRow is implemented using std::vector. This can be changed to std::tuple, which will make the data to be inserted more type safe.
2. Since a tuple cannot be traversed through a for loop, we may need to implement the function as a template. We can assume a limit on the number of columns.