Override equals method in CustomSignals class

[hotdogicn]

When I wrote code using the CustomSignals class, in the tests, I tried to verify if my code calling the setCustomSignals(CustomSignals) method really passed the correct parameter. But since the CustomSignals class doesn't currently have any method that allows external packages to get its content, nor does it even have the equals method implemented, I cannot check if 2 CustomSignals objects have the same contents. This commit overrides the equals method to enable testing involving the CustomSignals class.

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