Added insertion sort in java

[aman-ku]

#63

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Fixes #63

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[TravisBuddy]

Hey @aman-ku,
Something went wrong with the build.

TravisCI finished with status errored, which means the build failed because of something unrelated to the tests, such as a problem with a dependency or the build process itself.

View build log

TravisBuddy Request Identifier: a23479a0-13d2-11eb-a355-c174999d48b2

[sangamcse]

wow