java.lang.SecurityException: ... signer information does not match signer information of other classes in the same package exception

The exception gotten using Maven and jMock:

java.lang.SecurityException: class "org.hamcrest.TypeSafeMatcher"'s signer information does not match signer information of other classes in the same package
  at java.lang.ClassLoader.checkCerts(Unknown Source)
  ...

Sulution at:  java.lang.noclassdeffounderror using maven, jmock