Add Pipeline support

[gkorland]

No description provided.

[codecov]

Codecov Report

Merging #123 (3d9dce0) into master (5b14170) will decrease coverage by 2.13%.
The diff coverage is 47.05%.

@@             Coverage Diff              @@
##             master     #123      +/-   ##
============================================
- Coverage     75.28%   73.14%   -2.14%     
- Complexity      198      206       +8     
============================================
  Files            22       23       +1     
  Lines           623      674      +51     
  Branches         61       61              
============================================
+ Hits            469      493      +24     
- Misses          130      157      +27     
  Partials         24       24              

Impacted Files	Coverage Δ
...islabs/redisgraph/impl/api/RedisGraphPipeline.java	41.30% <41.30%> (ø)
...slabs/redisgraph/impl/api/ContextedRedisGraph.java	59.01% <100.00%> (+3.65%)	⬆️

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