rpc: improve RPC Client initialization

[AnnaShaleva]

Close #2463.

[codecov]

Codecov Report

Merging #2468 (1782e16) into master (a427411) will decrease coverage by 0.07%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #2468      +/-   ##
==========================================
- Coverage   85.17%   85.09%   -0.08%     
==========================================
  Files         291      291              
  Lines       36788    36780       -8     
==========================================
- Hits        31334    31298      -36     
- Misses       4138     4170      +32     
+ Partials     1316     1312       -4     

Impacted Files	Coverage Δ
pkg/rpc/client/client.go	85.60% <50.00%> (+3.64%)	⬆️
pkg/services/oracle/oracle.go	72.86% <0.00%> (-15.51%)	⬇️
pkg/network/compress.go	64.00% <0.00%> (-12.00%)	⬇️
pkg/services/oracle/request.go	57.99% <0.00%> (-5.03%)	⬇️

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[ixje]

thanks for the quick follow up 🙌