integration: run tests in parallel (#316)

Author: lupin012

integration/README.md

@@ -64,49 +64,50 @@ Launch an automated test sequence on Silkworm RpcDaemon (aka Silkrpc) or Erigon
 -e,--verify-external-provider: <provider_url> send any request also to external API endpoint as reference
 -i,--without-compare-results: send request without compare results
 -w,--waiting_time: waiting after test execution (millisec)
+-S,--serial: runs tests in serial way
 
 ```
 
 # Invoke examples
 
 ```
-./run_tests.py -b mainnet -d -c -v 1
+./run_tests.py -d -c -v 1
 ```
 
 Runs all tests on main net chain comparing Silkrpc response with rpcdaemon response, printing each test result
 
 ```
-./run_tests.py -b mainnet -c -v 1
+./run_tests.py -c -v 1
 ```
 
 Runs all tests on main net chain comparing silkrpc response to response saved on json file, printing each test result
 
 ```
-./run_tests.py -b mainnet -c -a eth_call
+./run_tests.py -c -A eth_call
 ```
 
 Runs all tests of eth_call on main net chain comparing silkrpc response with saved json file, printing only failed tests
 
 ```
-./run_tests.py -b mainnet -r -c -a eth_call -t 1
+./run_tests.py -r -c -A eth_call -t 1
 ```
 
 Runs test 1 of eth_call on main net chain comparing rpcdaemon response to saved json file, printing only failed tests
 
 ```
-./run_tests.py -b mainnet -r -c -t 20 -v 1
+./run_tests.py -r -c -t 20 -v 1
 ```
 
 Runs test number 20 in main net chain using rpcdaemon and compare result with json file, printing each test result
 
 ```
-./run_tests.py -b mainnet -d -c -X 20 -v 1
+./run_tests.py -d -c -X 20 -v 1
 ```
 
 Runs all tests (excluding test number 20) on main net chain comparing silkrpc response with rpcdaemon response, printing each test result
 
 ```
-./run_tests.py -b mainnet -d -c -x eth_call -v 1
+./run_tests.py -d -c -x eth_call -v 1
 ```