Issue: checkstyle#3985 Moved all input files to new folder

1. Updated EmptyLineSeparatorCheckTest.java with updated paths.
2. Moved InputEmptyLineSeparator[*].java to new folder emptylinesperator
3. Copied InputPrePreviousLineEmptiness and files under package-info to
the new folder.

src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/EmptyLineSeparatorCheckTest.java

@@ -40,7 +40,8 @@ public class EmptyLineSeparatorCheckTest
     @Override
     protected String getPath(String filename) throws IOException {
         return super.getPath("checks" + File.separator
-                + "whitespace" + File.separator + filename);
+                + "whitespace" + File.separator 
+                + "emptylineseparator" + File.separator + filename);
     }
 
     @Test

src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/emptylineseparator/InputPrePreviousLineEmptiness.java

@@ -0,0 +1,6 @@
+
+package com.puppycrawl.tools.checkstyle.checks.whitespace;
+
+public class InputPrePreviousLineEmptiness {
+
+}

src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/emptylineseparator/package-info/test1/package-info.java

@@ -0,0 +1,5 @@
+/*OK: for test allowing to place annotation before PACKAGE_DEF.*/
+@Deprecated
+package com.puppycrawl.tools.checkstyle.checks.whitespace.packageinfo.test1;
+
+import java.lang.Deprecated;

src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/emptylineseparator/package-info/test2/package-info.java

@@ -0,0 +1,6 @@
+/**OK: for test allowing to place javadoc before PACKAGE_DEF.*/
+package com.puppycrawl.tools.checkstyle.checks.whitespace.packageinfo.test2;
+
+//that import is for doing check of PACKAGE_DEF,
+//because EmptyLineSeparatorCheck doesn't check last token
+import java.lang.System;

src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/emptylineseparator/package-info/test3/package-info.java

@@ -0,0 +1,7 @@
+/*violation: for test that there's warning when block comment isn't 
+  separated from PACKAGE_DEF by line.*/
+package com.puppycrawl.tools.checkstyle.checks.whitespace.packageinfo.test3;
+
+//that import is for doing check of PACKAGE_DEF,
+//because EmptyLineSeparatorCheck doesn't check last token
+import java.lang.System;

src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/emptylineseparator/package-info/test4/package-info.java

@@ -0,0 +1,7 @@
+//for test there's warning when single line comment isn't separated from PACKAGE_DEF by line
+//violation is expected after this line
+package com.puppycrawl.tools.checkstyle.checks.whitespace.packageinfo.test4;
+
+//that import is for doing check of PACKAGE_DEF,
+//because EmptyLineSeparatorCheck doesn't check last token
+import java.lang.System;