Make all closable items implement AutoClosable

[kytpbs]

This is for unit testing support in the future

Implements AutoClosable on all IMUs, Motorsand **_Some_**Encoders`

Encoder Exceptions:

• SparkFlexEncoder
• SparkMaxEncoder
• TalonSRXEncoder
• ThriftyNovaEncoder

Due to these encoders being closed with the motors themselves and not implementing AutoClosable themselves, they have an empty comment explaining that in their close method

[thenetworkgrinch]

Why do you make the wrapper classes implement AutoClosable?

[kytpbs]

To provide a “clean slate” for each test, we need to have a function to destroy the object and free all hardware allocations. In Java, this is done by implementing the AutoCloseable interface and its .close() method, destroying each member object by calling the member’s .close() method - an object without a .close() method probably doesn’t need to be closed.

- From WPILIB docs explanation

Implementing AutoClosable is the advised way of making objects closable. since it also supports try-with-resources and it is also how close is done in WPILIB. You can look at the docs of AutoCloseable here: https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html

[thenetworkgrinch]

Thank you for this! I hope to add Unit tests one day and this is a great step in that direction!