Bump gradle wrapper to 4.7

[pavolloffay]

Signed-off-by: Pavol Loffay ploffay@redhat.com

[codecov]

Codecov Report

Merging #419 into master will increase coverage by 0.76%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #419      +/-   ##
============================================
+ Coverage     82.09%   82.86%   +0.76%     
- Complexity      490      491       +1     
============================================
  Files            66       66              
  Lines          2044     2019      -25     
  Branches        247      247              
============================================
- Hits           1678     1673       -5     
+ Misses          284      265      -19     
+ Partials         82       81       -1

Impacted Files	Coverage Δ	Complexity Δ
...ore/src/main/java/io/jaegertracing/utils/Http.java	92.3% <0%> (-1.03%)	2% <0%> (ø)
...in/java/io/jaegertracing/senders/ThriftSender.java	74.41% <0%> (-0.59%)	10% <0%> (ø)
.../io/jaegertracing/senders/zipkin/ZipkinSender.java	67.74% <0%> (-0.52%)	15% <0%> (ø)
...er-core/src/main/java/io/jaegertracing/Tracer.java	85.08% <0%> (-0.06%)	23% <0%> (ø)
...ava/io/jaegertracing/reporters/RemoteReporter.java	83.13% <0%> (+0.77%)	7% <0%> (ø)	⬇️
...reporters/protocols/JaegerThriftSpanConverter.java	96.66% <0%> (+1.58%)	22% <0%> (ø)	⬇️
...aegertracing/samplers/RemoteControlledSampler.java	80.41% <0%> (+2.63%)	18% <0%> (+1%)	⬆️
...a/io/jaegertracing/reporters/InMemoryReporter.java	66.66% <0%> (+4.16%)	4% <0%> (ø)	⬇️
...re/src/main/java/io/jaegertracing/utils/Utils.java	83.33% <0%> (+4.38%)	6% <0%> (ø)	⬇️
...eger-core/src/main/java/io/jaegertracing/Span.java	92.92% <0%> (+8.24%)	46% <0%> (ø)	⬇️
... and 1 more

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