Revert "minor: remove reflections library as it comes with checkstyle all"

This reverts commit 3da10af.

Author: Calixte

net.sf.eclipsecs.core/.classpath

@@ -9,6 +9,7 @@
 	<classpathentry kind="src" path="src"/>
 	<classpathentry exported="true" kind="lib" path="lib/dom4j-2.1.3.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/snakeyaml-1.26.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/reflections-0.9.10.jar"/>
 	<classpathentry kind="lib" path="lib/checkstyle-8.44-all.jar"/>
 	<classpathentry kind="output" path="target/classes"/>
 </classpath>

net.sf.eclipsecs.core/META-INF/MANIFEST.MF

@@ -7,6 +7,7 @@ Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Bundle-ClassPath: .,
  lib/dom4j-2.1.3.jar,
  lib/snakeyaml-1.26.jar,
+ lib/reflections-0.9.10.jar,
  lib/checkstyle-8.44-all.jar
 Bundle-Activator: net.sf.eclipsecs.core.CheckstylePlugin
 Bundle-ActivationPolicy: lazy

net.sf.eclipsecs.core/build.properties

@@ -8,6 +8,7 @@ bin.includes = .,\
                schema/,\
                core.properties,\
                lib/dom4j-2.1.3.jar, \
+               lib/reflections-0.9.10.jar, \
                lib/snakeyaml-1.26.jar, \
                lib/checkstyle-8.44-all.jar