BUG/MINOR: e2e: fix sites test

Since ordering of data is not guaranteed in sites, accessing properties by index caused flaky tests.
Instead we just check if property exists or not.

Author: amelhusic

e2e/tests/sites/data/haproxy.cfg

@@ -25,7 +25,7 @@ defaults
   timeout http-keep-alive 10s
   retries 3
 
-frontend test_site
+frontend myfrontend
   mode http
   maxconn 2000
   bind 127.0.0.1:9001

e2e/tests/sites/delete.bats

@@ -24,7 +24,7 @@ load '../../libs/version'
 load 'utils/_helpers'
 
 @test "sites: Delete a site" {
-  resource_delete "$_SITE_BASE_PATH/test_site" "force_reload=true"
+  resource_delete "$_SITE_BASE_PATH/myfrontend" "force_reload=true"
 	assert_equal "$SC" 204
 
 	resource_get "$_SITE_BASE_PATH/site"

e2e/tests/sites/list.bats

@@ -30,6 +30,6 @@ load 'utils/_helpers'
 	resource_get "$_SITE_BASE_PATH"
 	assert_equal "$SC" 200
 
-	assert_equal "$(get_json_path "$BODY" ".data[0].name")" "test_site"
-	assert_equal "$(get_json_path "$BODY" ".data[1].name")" "site"
+	assert_equal "$(get_json_path "$BODY" " .data[] | select(.name | contains(\"myfrontend\") ).name" )" "myfrontend"
+	assert_equal "$(get_json_path "$BODY" " .data[] | select(.name | contains(\"site\") ).name" )" "site"
 }