Returns the maximum number of consecutive invalid login attempts before account is locked out.
When the number of invalid logins within a specified period of time is greater than
<code>LockoutThreshold</code>value, the user is locked out. For example,
with the default setting of <code>1</code>, the user is locked out on the
second consecutive invalid login. With a setting of <code>2</code>, the user
is locked out on the third consecutive invalid login.
(Interface=weblogic.management.security.authentication.UserLockoutManagerMBean Attribute=getLockoutThreshold)