update instructions for oracle connection for level 2 scripts

[writetoritu]

thanks @npatibandla0214 - I got some time to look in to the scripts and the Argos package and, I think the issue I was having is that I am using src_oracle in the argos config file instead it should be Oracle. I think it will be good idea to change it in the instructions to just say postgres instead of src_postgres.

Then I found another issue which is in \Data-Quality\V28\Data-Quality-Analysis-1.3\Main\Level2\scripts\GenerateLevel2ADT_Occurrence.R, the import library is library(Postgres), for us it should be library(ROracle)