Security: Use ambiguous error message in forgot password for multisites #7247

Job	Run time
Parse.ly: 3.1 filter_enabled	10m 34s
Parse.ly: 3.1 filter_disabled	8m 33s
Parse.ly: 3.1 option_enabled	10m 58s
Parse.ly: 3.1 option_disabled	8m 53s
Parse.ly: 3.1 filter_and_option_enabled	8m 37s
Parse.ly: 3.1 filter_and_option_disabled	8m 33s
Parse.ly: filter_enabled	8m 42s
Parse.ly: filter_disabled	10m 9s
Parse.ly: option_enabled	10m 43s
Parse.ly: option_disabled	8m 46s
Parse.ly: filter_and_option_enabled	8m 30s
Parse.ly: filter_and_option_disabled	9m 32s
	1h 52m 30s

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