12 colliding keys (all hashCode()==1, so bin index 1) inserted into HashMap and ConcurrentHashMap
=================================================================================================

insert  | HashMap  table[1]  (length)  | ConcurrentHashMap  table[1]  (length, sizeCtl)
#1      | Node      (length 16 )        | Node      (length 16 , sizeCtl 12)
#2      | Node      (length 16 )        | Node      (length 16 , sizeCtl 12)
#3      | Node      (length 16 )        | Node      (length 16 , sizeCtl 12)
#4      | Node      (length 16 )        | Node      (length 16 , sizeCtl 12)
#5      | Node      (length 16 )        | Node      (length 16 , sizeCtl 12)
#6      | Node      (length 16 )        | Node      (length 16 , sizeCtl 12)
#7      | Node      (length 16 )        | Node      (length 16 , sizeCtl 12)
#8      | Node      (length 16 )        | Node      (length 16 , sizeCtl 12)
#9      | Node      (length 32 )        | Node      (length 128, sizeCtl 96)
#10     | Node      (length 64 )        | TreeBin   (length 128, sizeCtl 96)
#11     | TreeNode  (length 64 )        | TreeBin   (length 128, sizeCtl 96)
#12     | TreeNode  (length 64 )        | TreeBin   (length 128, sizeCtl 96)
