Add strict validation about boolean parameters

This ensures the parameters used by if-else logic accept only boolean
values because non-boolean can result in unexpected behavior.

Change-Id: I963d73e46f82a780486fa282b424151485e43d1e

manifests/api.pp

@@ -284,6 +284,11 @@ class barbican::api (
   include barbican::client
   include barbican::policy
 
+  validate_legacy(Boolean, 'validate_bool', $manage_service)
+  validate_legacy(Boolean, 'validate_bool', $enabled)
+  validate_legacy(Boolean, 'validate_bool', $sync_db)
+  validate_legacy(Boolean, 'validate_bool', $multiple_secret_stores_enabled)
+
   package { 'barbican-api':
     ensure => $package_ensure,
     name   => $::barbican::params::api_package_name,

manifests/init.pp

@@ -21,6 +21,8 @@ class barbican(
   include barbican::deps
   include barbican::params
 
+  validate_legacy(Boolean, 'validate_bool', $purge_config)
+
   package { 'barbican':
     ensure => $package_ensure,
     name   => $::barbican::params::common_package_name,

manifests/policy.pp

@@ -59,6 +59,7 @@ class barbican::policy (
   include barbican::params
 
   validate_legacy(Hash, 'validate_hash', $policies)
+  validate_legacy(Boolean, 'validate_bool', $purge_config)
 
   $policy_parameters = {
     policies     => $policies,

manifests/retry_scheduler.pp

@@ -35,6 +35,9 @@ class barbican::retry_scheduler (
   include barbican::deps
   include barbican::params
 
+  validate_legacy(Boolean, 'validate_bool', $manage_service)
+  validate_legacy(Boolean, 'validate_bool', $enabled)
+
   barbican_config {
     'retry_scheduler/initial_delay_seconds':         value => $initial_delay_seconds;
     'retry_scheduler/periodic_interval_max_seconds': value => $periodic_interval_max_seconds;

manifests/worker.pp

@@ -41,6 +41,9 @@ class barbican::worker (
 
   include barbican::deps
 
+  validate_legacy(Boolean, 'validate_bool', $manage_service)
+  validate_legacy(Boolean, 'validate_bool', $enabled)
+
   package { 'barbican-worker':
     ensure => $package_ensure,
     name   => $::barbican::params::worker_package_name,