Remove use of '<' and '>' which cause javadoc errors

Tested with Java 8 and "mvn javadoc:test-javadoc".  Eliminates errors such as:

    [ERROR] java/hudson/os/DCOMSandbox.java:18: error: bad use of '>'

core/src/test/java/hudson/FilePathTest.java

@@ -342,7 +342,7 @@ public class FilePathTest {
     }
             
     /**
-     * Checks that big files (>8GB) can be archived and then unpacked.
+     * Checks that big files (greater than 8GB) can be archived and then unpacked.
      * This test is disabled by default due the impact on RAM.
      * The actual file size limit is 8589934591 bytes.
      * @throws Exception test failure

core/src/test/java/hudson/model/FileParameterValueTest.java

@@ -33,7 +33,7 @@ import org.jvnet.hudson.test.Issue;
 
 /**
  * Test for {@link FileParameterValue}.
- * @author Oleg Nenashev <o.v.nenashev@gmail.com>
+ * @author Oleg Nenashev
  */
 public class FileParameterValueTest {
     

core/src/test/java/jenkins/widgets/HistoryPageFilterTest.java

@@ -59,7 +59,7 @@ public class HistoryPageFilterTest {
     }
 
     /**
-     * Latest/top page where total number of items < the max page size.
+     * Latest/top page where total number of items less than the max page size.
      */
     @Test
     public void test_latest_partial_page() throws IOException {
@@ -88,7 +88,7 @@ public class HistoryPageFilterTest {
     }
 
     /**
-     * Latest/top page where total number of items > the max page size.
+     * Latest/top page where total number of items greater than the max page size.
      */
     @Test
     public void test_latest_longer_list() throws IOException {