Configure execution sequence for WEB and API tests

File was configured to run tests in next sequence:
1. API test suite
2. WEB test suite
Only if API test suite is passed, will run WEB test suite. It's means
that, if one or more tests from API test suite has failed, WEB test suite
will skipped.

suite.py

@@ -1,6 +1,8 @@
 # pylint: disable=no-value-for-parameter
 import sys
 import os
+from typing import Tuple, Any, List
+
 from pyats import easypy
 
 from pyats.easypy.main import EasypyRuntime
@@ -54,19 +56,27 @@
 _deployment_tests = (deploy_app,)
 
 
-def main(runtime: EasypyRuntime) -> None:
-    for test_module in _api_tests + _web_tests + _deployment_tests:
+def tests_runner(test_suite: Tuple, instance: Any) -> List:  # type: ignore
+    test_suite_results = list()
+    for test_module in test_suite:
         full_test_path = test_module.__file__
-        easypy.run(  # pylint: disable=no-member
+        test_result = easypy.run(  # pylint: disable=no-member
             taskid=" -> ".join(
                 (
                     os.path.dirname(full_test_path).split(os.sep)[-1],
                     os.path.basename(full_test_path),
                 )
             ),
             testscript=full_test_path,
-            **mandatory_aetest_arguments(runtime.testbed, device_name="vm"),
+            **mandatory_aetest_arguments(instance, device_name="vm"),
         )
+        test_suite_results.append(str(test_result))
+    return test_suite_results
+
+
+def main(runtime: EasypyRuntime) -> None:
+    if "failed" not in tests_runner(_api_tests, runtime.testbed):
+        tests_runner(_web_tests, runtime.testbed)
 
 
 if __name__ == "__main__":