Enable Date type input in function Count()

[harold-wang]

Issue #916 , if available:

Description of changes:

• Add three input type (DATE, DATETIME, TIMESTAMP) in Count()
• Add UT (DATE, DATETIME or TIMESTAMP) input type

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[chloe-zh]

This PR also includes code changes of #914 ?

[harold-wang]

This PR also includes code changes of #914 ?

it should not.

[codecov]

Codecov Report

Merging #917 (be4e456) into develop (d170da3) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             develop     #917   +/-   ##
==========================================
  Coverage      99.85%   99.85%           
- Complexity      2149     2152    +3     
==========================================
  Files            216      216           
  Lines           4851     4858    +7     
  Branches         323      323           
==========================================
+ Hits            4844     4851    +7     
  Misses             5        5           
  Partials           2        2           

Impacted Files	Coverage Δ	Complexity Δ
...sql/expression/aggregation/AggregatorFunction.java	100.00% <100.00%> (ø)	40.00 <3.00> (+3.00)
...ssion/operator/arthmetic/MathematicalFunction.java	100.00% <100.00%> (ø)	122.00 <1.00> (ø)

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[chloe-zh]

This PR also includes code changes of #914 ?

it should not.

Could you merge the develop branch with latest commits to this branch?

[harold-wang]

A new PR #918 was used to replace this one