email-tests: Updated the test data that corresponds to the test number

Finished segregating the email protocol tests, into their own protocol
based ranges, in preparation of adding more e-mail related tests to the
test suite.

tests/data/test906

@@ -26,7 +26,7 @@ To: another
 body
 </stdin>
  <command>
-smtp://%HOSTIP:%SMTPPORT/user --mail-rcpt 814@foo -T -
+smtp://%HOSTIP:%SMTPPORT/user --mail-rcpt 906@foo -T -
 </command>
 </client>
 
@@ -36,7 +36,7 @@ smtp://%HOSTIP:%SMTPPORT/user --mail-rcpt 814@foo -T -
 <protocol>
 EHLO user
 MAIL FROM:<>
-RCPT TO:<814@foo>
+RCPT TO:<906@foo>
 DATA
 QUIT
 </protocol>