Changed the answers for collections to return a new instance every time

[Raibaz]

This fixes #510.

A change introduced in 1.10.2 added default answers for collections by using the helper listOf(), mapOf()...functions.

However, these all return the same instance of the corresponding collection, so when the AnyValueGenerator was used in creating matchers for recording calls the signature determination was broken: blocks stubbed as

every { doSomething(any(), any()) } just runs

Where both parameters are Lists were being mistakenly matched as doSomething(any(), eq([]).

By making sure that the `AnyValueGenerator´ always returns a new instance of collections, the signatures now take into account different values of the same type and result in proper matchers.

[oleksiyp]

Only one concern I might predict - more garbage generated, but believe we need to accept that, and most probably effect going to be minimal.

[codecov-io]

Codecov Report

Merging #536 (734e03c) into master (1466af1) will decrease coverage by 0.08%.
The diff coverage is 86.66%.

@@             Coverage Diff              @@
##             master     #536      +/-   ##
============================================
- Coverage     72.79%   72.71%   -0.09%     
+ Complexity      777      776       -1     
============================================
  Files            99       99              
  Lines          2764     2763       -1     
  Branches        431      431              
============================================
- Hits           2012     2009       -3     
  Misses          577      577              
- Partials        175      177       +2     

Impacted Files	Coverage Δ	Complexity Δ
...lin/io/mockk/impl/instantiation/JvmInstantiator.kt	100.00% <ø> (ø)	3.00 <0.00> (-1.00)
...n/io/mockk/impl/instantiation/AnyValueGenerator.kt	92.30% <83.33%> (-3.85%)	24.00 <0.00> (ø)
...o/mockk/impl/instantiation/JvmAnyValueGenerator.kt	79.16% <87.50%> (-4.17%)	15.00 <1.00> (ø)
...m/src/main/kotlin/io/mockk/impl/JvmMockKGateway.kt	89.24% <100.00%> (ø)	24.00 <1.00> (ø)

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