Optimize Entities capacity to avoid reallocation

[sazzad16]

Ported from:-
PR: redis/jedis#3090
Commit: redis/jedis@9f248fe

[codecov]

Codecov Report

Merging #145 (54bf749) into master (81302a1) will increase coverage by 0.52%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #145      +/-   ##
============================================
+ Coverage     70.84%   71.36%   +0.52%     
- Complexity      210      213       +3     
============================================
  Files            25       25              
  Lines           710      723      +13     
  Branches         65       65              
============================================
+ Hits            503      516      +13     
  Misses          175      175              
  Partials         32       32              

Impacted Files	Coverage Δ
.../com/redislabs/redisgraph/graph_entities/Edge.java	75.00% <100.00%> (+3.00%)	⬆️
...dislabs/redisgraph/graph_entities/GraphEntity.java	70.83% <100.00%> (+5.83%)	⬆️
.../com/redislabs/redisgraph/graph_entities/Node.java	83.33% <100.00%> (+3.33%)	⬆️
...slabs/redisgraph/impl/resultset/ResultSetImpl.java	78.22% <100.00%> (+0.35%)	⬆️

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