Use the same checkstyle-8.10 tag everywhere

Author: adangel

test/resources/pmd_report_builder/project-list.xml

@@ -8,6 +8,7 @@ xsi:noNamespaceSchemaLocation="projectlist_1_1_0.xsd">
     <name>checkstyle</name>
     <type>git</type>
     <connection>https://github.com/checkstyle/checkstyle</connection>
+    <tag>checkstyle-8.10</tag>
     <exclude-pattern>**/src/test/resources-noncompilable/**/*</exclude-pattern>
     <exclude-pattern>**/src/test/resources/**/*</exclude-pattern>
   </project>

test/resources/project_builder/project-list.xml

@@ -8,6 +8,7 @@ xsi:noNamespaceSchemaLocation="projectlist_1_1_0.xsd">
     <name>checkstyle</name>
     <type>git</type>
     <connection>https://github.com/checkstyle/checkstyle</connection>
+    <tag>checkstyle-8.10</tag>
     <exclude-pattern>**/src/test/resources-noncompilable/**/*</exclude-pattern>
     <exclude-pattern>**/src/test/resources/**/*</exclude-pattern>
     <build-command>mvn test-compile -B</build-command>

test/resources/project_diff_report/project-list.xml

@@ -8,6 +8,7 @@ xsi:noNamespaceSchemaLocation="projectlist_1_1_0.xsd">
     <name>checkstyle</name>
     <type>git</type>
     <connection>https://github.com/checkstyle/checkstyle</connection>
+    <tag>checkstyle-8.10</tag>
     <exclude-pattern>**/src/test/resources-noncompilable/**/*</exclude-pattern>
     <exclude-pattern>**/src/test/resources/**/*</exclude-pattern>
     <build-command>mvn test-compile -B</build-command>

test/resources/projects_parser/project-list.xml

@@ -8,6 +8,7 @@ xsi:noNamespaceSchemaLocation="projectlist_1_1_0.xsd">
     <name>checkstyle</name>
     <type>git</type>
     <connection>https://github.com/checkstyle/checkstyle</connection>
+    <tag>checkstyle-8.10</tag>
     <exclude-pattern>**/src/test/resources-noncompilable/**/*</exclude-pattern>
     <exclude-pattern>**/src/test/resources/**/*</exclude-pattern>
     <build-command>mvn test-compile -B</build-command>

test/resources/summary_report_builder/project-list.xml

@@ -8,6 +8,7 @@ xsi:noNamespaceSchemaLocation="projectlist_1_1_0.xsd">
     <name>checkstyle</name>
     <type>git</type>
     <connection>https://github.com/checkstyle/checkstyle</connection>
+    <tag>checkstyle-8.10</tag>
     <exclude-pattern>**/src/test/resources-noncompilable/**/*</exclude-pattern>
     <exclude-pattern>**/src/test/resources/**/*</exclude-pattern>
     <build-command>mvn test-compile -B</build-command>