Added hashCode()

[lcowan94]

Added hasCode() to EntityID

[leif81]

Thanks @lcowan94

I see the DIS6 EntityID class has a hashCode method, I wasn't familar with it until I went looking for it just now. I see it's a bit different and has a comment about why it was a certain way. Can you take a look. I wonder if we shouldn't copy the same for the DIS7 EntityID. Does it matter to you which implementation of hashCode we use here?

open-dis-java/src/main/java/edu/nps/moves/dis/EntityID.java

Line 149 in 5a8b914

public int hashCode()

[lcowan94]

I've added some tests for the equals and hashCode methods

[leif81]

Thank-you @lcowan94 !