Add missing since tag for SshTestHarness#publicKey2

Change-Id: Ib6e4945340d2e1761dc0e787bdbe72286cdc95bc

org.eclipse.jgit.junit.ssh/.settings/.api_filters

diff --git a/org.eclipse.jgit.junit.ssh/.settings/.api_filters b/org.eclipse.jgit.junit.ssh/.settings/.api_filters
new file mode 100644
index 0000000..fb27d49
--- /dev/null
+++ b/org.eclipse.jgit.junit.ssh/.settings/.api_filters
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<component id="org.eclipse.jgit.junit.ssh" version="2">
+    <resource path="src/org/eclipse/jgit/junit/ssh/SshTestHarness.java" type="org.eclipse.jgit.junit.ssh.SshTestHarness">
+        <filter id="336658481">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.junit.ssh.SshTestHarness"/>
+                <message_argument value="publicKey2"/>
+            </message_arguments>
+        </filter>
+    </resource>
+</component>

org.eclipse.jgit.junit.ssh/src/org/eclipse/jgit/junit/ssh/SshTestHarness.java

diff --git a/org.eclipse.jgit.junit.ssh/src/org/eclipse/jgit/junit/ssh/SshTestHarness.java b/org.eclipse.jgit.junit.ssh/src/org/eclipse/jgit/junit/ssh/SshTestHarness.java
index 90d981b..a28d5eb 100644
--- a/org.eclipse.jgit.junit.ssh/src/org/eclipse/jgit/junit/ssh/SshTestHarness.java
+++ b/org.eclipse.jgit.junit.ssh/src/org/eclipse/jgit/junit/ssh/SshTestHarness.java
@@ -76,6 +76,9 @@ public abstract class SshTestHarness extends RepositoryTestCase {
 
 	protected File publicKey1;
 
+	/**
+	 * @since 5.10
+	 */
 	protected File publicKey2;
 
 	protected SshTestGitServer server;