Issue 3244: Checkstyle fails on JDK11 while using Gradle daemon - needs an absolute path

[eolivelli]

Change log description
The fix is to use an absolute path in order to refer to the suppressions.xml file.

See detailed explanation in #3244

Purpose of the change
Fixes #3244

What the code does
Compute the absolute path during the execution of the build configuration script and do not rely on relative paths

How to verify it
run this command without errors
JAVA_HOME=/path/to/jdk11 ./gradlew checkstyleMain checkstyleTest

[eolivelli]

@tkaitchuck @fpj @shrids
this is the second part of the JDK11 support

[codecov]

Codecov Report

Merging #3245 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #3245      +/-   ##
============================================
- Coverage     78.87%   78.81%   -0.06%     
+ Complexity     7986     7979       -7     
============================================
  Files           608      608              
  Lines         31349    31349              
  Branches       3011     3011              
============================================
- Hits          24725    24709      -16     
- Misses         4859     4869      +10     
- Partials       1765     1771       +6

Impacted Files	Coverage Δ	Complexity Δ
...server/attributes/ContainerAttributeIndexImpl.java	79.71% <0%> (-10.15%)	17% <0%> (-2%)
...gmentstore/server/writer/StorageWriterFactory.java	92.5% <0%> (-5%)	2% <0%> (ø)
...eventProcessor/requesthandlers/SealStreamTask.java	90.9% <0%> (-3.64%)	23% <0%> (-1%)
...tore/server/reading/RedirectedReadResultEntry.java	85.24% <0%> (-3.28%)	24% <0%> (-2%)
...ga/controller/store/client/StoreClientFactory.java	79.59% <0%> (-2.05%)	10% <0%> (-1%)
...ient/segment/impl/AsyncSegmentInputStreamImpl.java	74.13% <0%> (-1.73%)	20% <0%> (-1%)
...a/io/pravega/segmentstore/server/CacheManager.java	79.72% <0%> (-1.36%)	35% <0%> (-1%)
...pravega/controller/store/stream/ZKStoreHelper.java	66.66% <0%> (-1.15%)	48% <0%> (ø)
...a/segmentstore/server/logs/OperationProcessor.java	84.75% <0%> (-1.12%)	38% <0%> (-3%)
...o/pravega/client/stream/impl/ReaderGroupState.java	87.77% <0%> (-0.25%)	41% <0%> (ø)
... and 3 more

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