It didn't worked out Ryan. I now removed all the JDBC jar files again which atleast allowed me to login to portal with the exception of validating the connection profiles. But the strange thing is, I checked the option to integrated windows authentication. But the exception is something like the below.
" CA Test Data Manager Portal
The server replied: Could not get JDBC Connection; Login failed for user '<mydomain>\<mymachinename>$'. ClientConnectionId:some guid()
Ideally the exception should have been like login failed for user '<mydomain>\<myusername>$'. Couldn't narrow down any further.
Once again thank you for the time and effort in helping me resolving this issue.
Thanks
Sethu