Handle short in PropertyElf

[freafrea]

When the dataSource class has a method setX(short Y) then PropertyElf did not handle this case. Added similarly to int/long/boolean handling. Added tests.

[codecov]

Codecov Report

Merging #1581 into dev will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                dev    #1581      +/-   ##
============================================
+ Coverage     70.11%   70.14%   +0.02%     
- Complexity      561      562       +1     
============================================
  Files            26       26              
  Lines          2118     2120       +2     
  Branches        296      297       +1     
============================================
+ Hits           1485     1487       +2     
  Misses          487      487              
  Partials        146      146              

Impacted Files	Coverage Δ	Complexity Δ
.../main/java/com/zaxxer/hikari/util/PropertyElf.java	87.69% <100.00%> (+0.39%)	23.00 <0.00> (+1.00)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8a28f6e...e18d95c. Read the comment docs.

[freafrea]

Hi, is there something that I should do, so you could merge this? :)

[johnou]

@freafrea which datasource method are you invoking which uses short?

[freafrea]

I have a jdbc driver in which setPort has signature void setPort(short port). It is an old one, but I still have to use it.