close connection on graph destruction

[AvitalFineRedis]

Close connection on graph object destruction only when the connection was created by the constructor (bypassing host and port)

[codecov[bot]]

Codecov Report

Merging #130 (1fbae80) into master (eff17ac) will increase coverage by 0.05%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #130      +/-   ##
==========================================
+ Coverage   85.41%   85.46%   +0.05%     
==========================================
  Files           8        8              
  Lines         521      523       +2     
==========================================
+ Hits          445      447       +2     
  Misses         76       76              

Impacted Files	Coverage Δ
redisgraph/graph.py	87.50% <100.00%> (+0.17%)	:arrow_up:

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[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication