[LIVY-628][LIVY-629][LIVY-630][THRIFT][WIP]: Support getDelegationToken, cancelDelegationToken, renewDelegationToken

[runzhiwang]

What changes were proposed in this pull request?

Support renewDelegationToken, getDelegationToken, cancelDelegationToken

How was this patch tested?

we will test it in the near future.

[codecov-io]

Codecov Report

Merging #205 into master will increase coverage by 0.01%. The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #205      +/-   ##
============================================
+ Coverage     68.37%   68.39%   +0.01%     
- Complexity      919      922       +3     
============================================
  Files           100      100              
  Lines          5717     5717              
  Branches        867      867              
============================================
+ Hits           3909     3910       +1     
  Misses         1244     1244              
+ Partials        564      563       -1

Impacted Files	Coverage Δ	Complexity Δ
...c/main/scala/org/apache/livy/repl/ReplDriver.scala	30.76% <0%> (-2.57%)	7% <0%> (ø)
...main/scala/org/apache/livy/server/LivyServer.scala	35.46% <0%> (-0.5%)	11% <0%> (ø)
...ain/java/org/apache/livy/rsc/driver/RSCDriver.java	79.23% <0%> (+1.27%)	42% <0%> (+1%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 3cdb7b2...00ca2ed. Read the comment docs.