Almost all test scripts currently need to override the __init__()
method. When they do that they need to call into super().__init__() as
the base class does some generic initialization.
This commit makes the base class __init__() call into set_test_params()
method. Individual test cases can override set_test_params() to setup
their test parameters.
* Split run_test into 4 separate tests
* Add 2 tests, getconnectioncount and getnettotals
* getnettotals - Strategy of test is to get the network stats before and after a ping. The difference in bytes sent/received is the bytes needed for a ping/pong.
