Added the hostname field to the <testsuite> element.
Added <properties> and child <property> elements to the <testsuite> element, containing “non-standard” data elements:

• commits: GitHub commit hashes.
• log_file: URL or relative path to the full log file.

Two ways to test PR#44:

1. Use scoreboard.pl:
   ====================
   1.1 Create and cd to a test directory that contains the build_logs directory. The build_logs directory contains a test.xml file and at least one build directory:
   $ ls -R build_logs
   build1 test.xml
   build_logs/build1: 2021_03_07_16_45.txt 2021_03_08_16_59.txt 2021_03_09_17_33.txt latest.txt status.txt post
   $ cat build_logs/test.xml
   <scoreboard>
   <group>
   <name>Group 1</name>
   <build>
   <name>build1</name>
   </build>
   </group>
   </scoreboard>
   1.2 Run scoreboard.pl:
   $ <path to>/autobuild/scoreboard.pl -c -v -u -d build_logs -o test.html -f build_logs/test.xml
   1.3 Verify that the *_JUnit.xml files contain the property entries of git commit and of path to the full log html file.

2. Use autobuild.pl:
   ====================
   2.1 In the OpenDDS root, create a workspace directory that contains a log file and a config file:
   $ ls -R workspace/
   2021_03_09_17_33.txt config_process_logs_only.xml
   Replace 'OpenDDS_ROOT' with the actual path to the OpenDDS root:
   $ cat workspace/config_process_logs_only.xml
   <autobuild>
   <configuration>
   <variable name="project_root" value="OpenDDS_ROOT"/>
   <variable name="root" value="OpenDDS_ROOT/workspace"/>
   <variable name="log_root" value="OpenDDS_ROOT/workspace"/>
   <variable name="log_file" value="2021_03_09_17_33.txt"/>
   <variable name="junit_xml_output" value="2021_03_09_17_33"/>
   </configuration>
   <command name="process_logs" options="prettify"/>
   </autobuild>
   2.2 Run autobuild.pl:
   $ <path to>/autobuild/autobuild.pl workspace/config_process_logs_only.xml
   2.3 Verify that the *_JUnit.xml file contains the property entries of git commit and of path to the full log html file.
   $ cat workspace/2021_03_09_17_33_JUnit.xml | grep "property"
   <property name="GIT_COMMIT_OPENDDS" value="6c45822ce73ac6a1e9370e48ed7ac836a91b6ffd"/>
   <property name="log_file" value="OpenDDS_ROOT/workspace/2021_03_09_17_33_Full.html"/>