Allow name=*|--all state=latest to update all packages

conda.py

@@ -224,6 +224,9 @@ def _update_package(module, conda, installed, name):
     if not installed:
         module.fail_json(msg='can\'t update a package that is not installed')
 
+    if name == '*':
+        name = '--all'
+
     # see if it's already installed at the latest version
     command = [
         conda,
@@ -284,7 +287,10 @@ def main():
     state = module.params['state']
     version = module.params['version']
 
-    installed, installed_version = _check_installed(module, conda, name)
+    if name == '*' or name == '--all':
+        installed = True
+    else:
+        installed, installed_version = _check_installed(module, conda, name)
 
     if state == 'absent':
         _remove_package(module, conda, installed, name)