HPCC-11322 Allow parameters to be passed to regression suite queries

Add new command line parameter called '-X' to pass parameter(s) with value
to ECL command to set the stored input value (stored('name')).

Add feature to set stored input value(s) for individual or group of tests
using wildcard '\*' from Regression Suite config file.
    "Params":[
            "querya.ecl:param1=value1,param2=value2",
            "queryb.ecl:param1=value3",
            "some*.ecl:paramforsome=value4",
            "*.ecl:globalparam=blah"
        ]

Update README.rst

Signed-off-by: Attila Vamos <attila.vamos@gmail.com>