[Composer] Set metarepo branch for tests and requirements for 2.2 branch

Author: mnocon

composer.json

@@ -31,7 +31,7 @@
         "symfony/asset": "^5.0",
         "symfony/yaml": "^5.0",
         "jms/translation-bundle": "^1.5",
-        "ezsystems/ezplatform-kernel": "^1.2@dev",
+        "ezsystems/ezplatform-kernel": "~1.2.0@dev",
         "ezsystems/ezplatform-content-forms": "^1.0@dev",
         "ezsystems/ezplatform-design-engine": "^3.0@dev",
         "ezsystems/ezplatform-user": "^2.0@dev",
@@ -58,7 +58,7 @@
         "fix-cs": "@php ./vendor/bin/php-cs-fixer fix -v --show-progress=estimating"
     },
     "extra": {
-        "_ezplatform_branch_for_behat_tests": "master",
+        "_ezplatform_branch_for_behat_tests": "3.2",
         "branch-alias": {
             "dev-tmp_ci_branch": "2.2.x-dev",
             "dev-master": "2.2.x-dev"