refactor(bootstrap,configuration,environment): add defaults/main.yml and extract hardcoded values

roles/environment/defaults/main.yml

@@ -0,0 +1,10 @@
+---
+# Connection and timing
+environment_wait_timeout: 180
+environment_wait_delay: 5
+
+# Pacman installer settings
+environment_parallel_downloads: 20
+environment_pacman_lock_timeout: 120
+environment_pacman_retries: 4
+environment_pacman_retry_delay: 15