Update test execution environment to Python for tests

This patch moves all the execution environment definition to the new one provided by beat/beat.env.builder>

beat/backend/python/test/test_databases_provider.py

@@ -80,7 +80,7 @@ CONFIGURATION = {
     },
     "algorithm": "user/integers_echo/1",
     "parameters": {},
-    "environment": {"name": "Python 2.7", "version": "1.2.0"},
+    "environment": {"name": "Python for tests", "version": "1.3.0"},
     "outputs": {
         "out_data": {
             "path": "20/61/b6/2df3c3bedd5366f4a625c5d87ffbf5a26007c46c456e9abf21b46c6681",
@@ -113,7 +113,7 @@ CONFIGURATION_ERROR = {
     },
     "algorithm": "user/integers_echo/1",
     "parameters": {},
-    "environment": {"name": "Python 2.7", "version": "1.2.0"},
+    "environment": {"name": "Python for tests", "version": "1.3.0"},
     "outputs": {
         "out_data": {
             "path": "20/61/b6/2df3c3bedd5366f4a625c5d87ffbf5a26007c46c456e9abf21b46c6681",