Revert "Revert "Set version to 2.4.0.M1""

This reverts commit 73fab550382a6aab61b0f4d8ce56c18ed79dc75a.
Use aspectj 1.7.4

https://jira.springsource.org/browse/SPR-11273
https://github.com/spring-projects/spring-framework/commit/d1b1770eba984ff9a9de45dbaa347dac9e1fe4cb