Fix Dag V2 tests

[sazzad16]

No description provided.

[codecov]

Codecov Report

Merging #51 (546c331) into master (b6b9871) will increase coverage by 4.98%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #51      +/-   ##
==========================================
+ Coverage   81.75%   86.73%   +4.98%     
==========================================
  Files          12       12              
  Lines         800      799       -1     
  Branches      113      112       -1     
==========================================
+ Hits          654      693      +39     
+ Misses         97       53      -44     
- Partials       49       53       +4     

Impacted Files	Coverage Δ
src/main/java/com/redislabs/redisai/Dag.java	86.48% <100.00%> (+33.85%)	⬆️
src/main/java/com/redislabs/redisai/Keyword.java	100.00% <100.00%> (ø)
src/main/java/com/redislabs/redisai/RedisAI.java	81.22% <100.00%> (+5.24%)	⬆️
src/main/java/com/redislabs/redisai/Model.java	90.76% <0.00%> (+1.08%)	⬆️

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[sazzad16]

LGTM

@DvirDukhan please merge this PR