Update Tycho to 1.5.1

This release fixes bug 552346 [1].

[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=552346

Change-Id: I53be02c3702e62d3b5ceb85141b9798571a8ca0c
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.packaging/pom.xml

@@ -55,7 +55,7 @@
   <name>JGit Tycho Parent</name>
 
   <properties>
-    <tycho-version>1.5.0</tycho-version>
+    <tycho-version>1.5.1</tycho-version>
     <tycho-extras-version>${tycho-version}</tycho-extras-version>
     <target-platform>jgit-4.6</target-platform>
   </properties>

pom.xml

@@ -200,7 +200,7 @@
     <slf4j-version>1.7.2</slf4j-version>
     <log4j-version>1.2.15</log4j-version>
     <maven-javadoc-plugin-version>3.1.1</maven-javadoc-plugin-version>
-    <tycho-extras-version>1.4.0</tycho-extras-version>
+    <tycho-extras-version>1.5.1</tycho-extras-version>
     <gson-version>2.8.2</gson-version>
     <bouncycastle-version>1.61</bouncycastle-version>
     <spotbugs-maven-plugin-version>3.1.12.2</spotbugs-maven-plugin-version>