Changing eagarDisabled field initial value to reflect the expected defau...

Changing eagarDisabled field initial value to reflect the expected defaut value.

As Maciej described in https://bugzilla.redhat.com/show_bug.cgi?id=1155855#c12 , System property "jbpm.ht.eager.disabled" is 'false' by default so TaskTransactionInterceptor.eagerDisabled is intentionally 'false' by default.

This PR doesn't change the behavior at all but just change the eagarDisabled field initial value to reflect the expected defaut value ('false') for readability.