Fix/issue 299

[Phoenix500526]

Please briefly answer these questions:
Fix issue #299 .

• what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?)
  Read issue Refactor: sharing state between CurpServer and CurpClient #299 for more details.

• what changes does this pull request make?

• are there any non-obvious implications of these changes? (does it break compatibility with previous versions, etc)

[codecov]

Codecov Report

Merging #302 (8fd26fc) into master (23a84d2) will increase coverage by 0.46%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #302      +/-   ##
==========================================
+ Coverage   54.23%   54.69%   +0.46%     
==========================================
  Files          75       75              
  Lines       12295    12385      +90     
  Branches    12295    12385      +90     
==========================================
+ Hits         6668     6774     +106     
+ Misses       5192     5168      -24     
- Partials      435      443       +8     

Impacted Files	Coverage Δ
curp/src/client.rs	4.40% <0.00%> (-7.84%)	⬇️
curp/src/server/curp_node.rs	24.26% <0.00%> (-0.16%)	⬇️
curp/src/server/mod.rs	0.00% <0.00%> (ø)
curp/src/server/raw_curp/mod.rs	62.91% <0.00%> (-0.74%)	⬇️
xline/src/client/mod.rs	0.00% <0.00%> (ø)
xline/src/server/lease_server.rs	0.00% <0.00%> (ø)
xline/src/server/xline_server.rs	0.00% <0.00%> (ø)

... and 6 files with indirect coverage changes