Joel Bernstein 4f6e78282f SOLR-13391: Add variance and standard deviation stream evaluators
Squashed commit of the following:

commit 406d4b959a42e4830ac1c52836ccbcfc1b614b46
Author: Nazerke <seinaz1997@gmail.com>
Date:   Fri Apr 12 14:03:34 2019 +0200

    added missing package

commit 32c239687c39c5da3e4f2d0f25df73127331fa99
Author: Nazerke <seinaz1997@gmail.com>
Date:   Fri Apr 12 14:03:14 2019 +0200

    added package

commit 7b3f9bd415002969a4ec5d87a9ffbfd6fcff6e92
Author: Nazerke <seinaz1997@gmail.com>
Date:   Fri Apr 12 14:02:28 2019 +0200

    added var and stddev functions

commit 77c4f9fdd9f111862a55b645aad960457291414c
Author: Nazerke <seinaz1997@gmail.com>
Date:   Fri Apr 12 14:00:59 2019 +0200

    added test for the variance and standard deviation stream evaluators

commit 2d9692c178590b65e46cfd9e04ca0384c7d39ec5
Author: naz <nazerke.seidan@cloudera.com>
Date:   Wed Apr 10 19:50:30 2019 +0200

    added var and stddev new evaluators

commit d265225747bce9a0eabd713994ddd4990dbbbfa2
Author: naz <nazerke.seidan@cloudera.com>
Date:   Wed Apr 10 19:49:23 2019 +0200

    variance streaming evaluator

commit a3330064bb62b5723b9125334ef1d61fc3b098d3
Author: naz <nazerke.seidan@cloudera.com>
Date:   Wed Apr 10 19:49:02 2019 +0200

    standard deviation streaming evaluator
2019-04-12 09:58:16 -04:00
..
2018-12-16 16:58:20 +00:00