Rule 6.1.11 Use apply for object initialization

[petertrr]

What's done:

• Added rule
• Added tests on checks

This pull request closes #446

Actions checklist

• Implemented Rule, added Warnings
• Added tests on checks
• Added tests on fixers
• Updated diktat-analysis.yml
• Updated available-rules.md

Fixme:

• When assigned variable name is also a this@apply's property, it should be changed to qualified name:

    fun convertToOption(): Option {
        val resOption = Option(shortName, longName, hasArgs, helpDescr)
        resOption.isRequired = isRequired
        return resOption
// should be
    fun convertToOption() = Option(shortName, longName, hasArgs, helpDescr).apply {
        isRequired = this@CliArgument.isRequired
    }

[codecov]

Codecov Report

Merging #491 (06b9a5d) into master (eaa3fca) will increase coverage by 0.05%.
The diff coverage is 85.48%.

@@             Coverage Diff              @@
##             master     #491      +/-   ##
============================================
+ Coverage     81.85%   81.90%   +0.05%     
- Complexity     1563     1576      +13     
============================================
  Files            74       75       +1     
  Lines          3912     3974      +62     
  Branches       1249     1259      +10     
============================================
+ Hits           3202     3255      +53     
- Misses          211      212       +1     
- Partials        499      507       +8     

Flag	Coverage Δ	Complexity Δ
unittests	81.90% <85.48%> (+0.05%)	0.00 <13.00> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
...at-rules/src/main/kotlin/generated/WarningNames.kt	0.00% <ø> (ø)	0.00 <0.00> (ø)
...tat/ruleset/rules/classes/CompactInitialization.kt	85.00% <85.00%> (ø)	13.00 <13.00> (?)
...tlin/org/cqfn/diktat/ruleset/constants/Warnings.kt	98.27% <100.00%> (+0.01%)	10.00 <0.00> (ø)
...cqfn/diktat/ruleset/rules/DiktatRuleSetProvider.kt	97.14% <100.00%> (+0.04%)	8.00 <0.00> (ø)

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[orchestr7]

lgtm