Adding support for Apache Skywalking

[akshathsk]

Description

This PR enables CTest support to Apache Skywalking

Details

Skywalking stores configs as a yml (application.yml). The configs are maintained in a 4-level hierarchical structure in the yaml.
The hierarchy followed for each config is as follows -

Module
  Provider
    Property (this is of type java.util.Property)
      Sub-Property (this is of type java.util.Property)

To parse configs and enable CTests on this project 3 jars are added in this PR -

1. Java code core/identify_param/skywalking - To find configs used by each test case
2. Existing python module core/generate_value/value_generation.py updated to support skywalking
3. Java code core/generate_ctest/skywalking - To generate the ctest json data/ctest_mapping/skywalking.json
4. Java code identify_param/skywalking - To run a CTest with a config injection file

Results

1. Module core/identify_param/skywalking generates 2 files
   a.core/identify_param/results/skywalking/skywalking-test-to-config-flat.json
   b. core/identify_param/results/skywalking/skywalking-test-to-config.json

2. Module core/generate_value/value_generation.py generates
   a. core/generate_value/skywalking-generated-values.tsv

3. Module core/generate_ctest/skywalking generates
   a. data/ctest_mapping/skywalking.json

Skywalking modules supported

1. oap-server/server-starter
2. oap-server/server-configuration/configuration-apollo
3. oap-server/server-configuration/configuration-consul
4. oap-server/server-configuration/configuration-zookeeper
5. oap-server/analyzer/agent-analyzer
6. oap-server/server-configuration/configuration-nacos