Enable short-circuiting in has_cached_role

Rather than iterate through the entire roles array and then report if
there are any values returned, we can instead use any? with a block
that will short-circuit when the first truthy value is returned.

This changes the call signature for RoleAdapter#find_cached* to return
boolean rather than an array

lib/rolify/adapters/active_record/role_adapter.rb

@@ -25,7 +25,7 @@ def find_cached(relation, args)
 
         return relation.find_all { |role| role.name == args[:name].to_s } if args[:resource] == :any
 
-        relation.find_all do |role|
+        relation.any? do |role|
           (role.name == args[:name].to_s && role.resource_type == nil && role.resource_id == nil) ||
           (role.name == args[:name].to_s && role.resource_type == resource_type && role.resource_id == nil) ||
           (role.name == args[:name].to_s && role.resource_type == resource_type && role.resource_id == resource_id)
@@ -36,7 +36,7 @@ def find_cached_strict(relation, args)
         resource_id = (args[:resource].nil? || args[:resource].is_a?(Class)) ? nil : args[:resource].id
         resource_type = args[:resource].is_a?(Class) ? args[:resource].to_s : args[:resource].class.name
 
-        relation.find_all do |role|
+        relation.any? do |role|
           role.resource_id == resource_id && role.resource_type == resource_type && role.name == args[:name].to_s
         end
       end

lib/rolify/adapters/mongoid/role_adapter.rb

@@ -25,7 +25,7 @@ def find_cached(relation, args)
 
         return relation.find_all { |role| role.name == args[:name].to_s } if args[:resource] == :any
 
-        relation.find_all do |role|
+        relation.any? do |role|
           (role.name == args[:name].to_s && role.resource_type == nil && role.resource_id == nil) ||
           (role.name == args[:name].to_s && role.resource_type == resource_type && role.resource_id == nil) ||
           (role.name == args[:name].to_s && role.resource_type == resource_type && role.resource_id == resource_id)
@@ -36,7 +36,7 @@ def find_cached_strict(relation, args)
         resource_id = (args[:resource].nil? || args[:resource].is_a?(Class)) ? nil : args[:resource].id
         resource_type = args[:resource].is_a?(Class) ? args[:resource].to_s : args[:resource].class.name
 
-        relation.find_all do |role|
+        relation.any? do |role|
           role.resource_id == resource_id && role.resource_type == resource_type && role.name == args[:name].to_s
         end
       end

lib/rolify/role.rb

@@ -46,11 +46,11 @@ def has_strict_role?(role_name, resource)
 
     def has_cached_role?(role_name, resource = nil)
       return has_strict_cached_role?(role_name, resource) if self.class.strict_rolify and resource and resource != :any
-      self.class.adapter.find_cached(self.roles, name: role_name, resource: resource).any?
+      self.class.adapter.find_cached(self.roles, name: role_name, resource: resource)
     end
 
     def has_strict_cached_role?(role_name, resource = nil)
-      self.class.adapter.find_cached_strict(self.roles, name: role_name, resource: resource).any?
+      self.class.adapter.find_cached_strict(self.roles, name: role_name, resource: resource)
     end
 
     def has_all_roles?(*args)