Update target definitions for Orbit latest (#3618)

Author: briandealwis

eclipse/eclipse-2018-09/gcp-eclipse-2018-09.target

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="GCP for Eclipse 2018-09" sequenceNumber="1583350906">
+<target name="GCP for Eclipse 2018-09" sequenceNumber="1591024090">
   <locations>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">
       <unit id="org.eclipse.sdk.feature.group" version="4.9.0.v20180906-1121"/>
@@ -41,7 +41,7 @@
       <unit id="org.slf4j.apis.jcl" version="1.7.30.v20200204-2150"/>
       <unit id="org.slf4j.apis.log4j" version="1.7.30.v20200204-2150"/>
       <unit id="org.slf4j.bridge.jul" version="1.7.30.v20200204-2150"/>
-      <unit id="ch.qos.logback.slf4j" version="1.1.2.v20160301-0943"/>
+      <unit id="ch.qos.logback.slf4j" version="1.2.3.v20200428-2012"/>
       <repository location="http://download.eclipse.org/tools/orbit/downloads/latest-R/"/>
     </location>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">

eclipse/eclipse-2018-12/gcp-eclipse-2018-12.target

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="GCP for Eclipse 2018-12" sequenceNumber="1583350901">
+<target name="GCP for Eclipse 2018-12" sequenceNumber="1591024092">
   <locations>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">
       <unit id="org.eclipse.sdk.feature.group" version="4.10.0.v20181206-1038"/>
@@ -41,7 +41,7 @@
       <unit id="org.slf4j.apis.jcl" version="1.7.30.v20200204-2150"/>
       <unit id="org.slf4j.apis.log4j" version="1.7.30.v20200204-2150"/>
       <unit id="org.slf4j.bridge.jul" version="1.7.30.v20200204-2150"/>
-      <unit id="ch.qos.logback.slf4j" version="1.1.2.v20160301-0943"/>
+      <unit id="ch.qos.logback.slf4j" version="1.2.3.v20200428-2012"/>
       <repository location="http://download.eclipse.org/tools/orbit/downloads/latest-R/"/>
     </location>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">

eclipse/eclipse-2019-09/gcp-eclipse-2019-09.target

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="GCP for Eclipse 2019-09" sequenceNumber="1583350898">
+<target name="GCP for Eclipse 2019-09" sequenceNumber="1591024096">
   <locations>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">
       <unit id="org.eclipse.sdk.feature.group" version="4.13.0.v20190916-1323"/>
@@ -41,7 +41,7 @@
       <unit id="org.slf4j.apis.jcl" version="1.7.30.v20200204-2150"/>
       <unit id="org.slf4j.apis.log4j" version="1.7.30.v20200204-2150"/>
       <unit id="org.slf4j.bridge.jul" version="1.7.30.v20200204-2150"/>
-      <unit id="ch.qos.logback.slf4j" version="1.1.2.v20160301-0943"/>
+      <unit id="ch.qos.logback.slf4j" version="1.2.3.v20200428-2012"/>
       <repository location="http://download.eclipse.org/tools/orbit/downloads/latest-R/"/>
     </location>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">

eclipse/eclipse-2019-12/gcp-eclipse-2019-12.target

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="GCP for Eclipse 2019-12" sequenceNumber="1583350894">
+<target name="GCP for Eclipse 2019-12" sequenceNumber="1591024101">
   <locations>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">
       <unit id="org.eclipse.sdk.feature.group" version="4.14.0.v20191210-0610"/>
@@ -41,7 +41,7 @@
       <unit id="org.slf4j.apis.jcl" version="1.7.30.v20200204-2150"/>
       <unit id="org.slf4j.apis.log4j" version="1.7.30.v20200204-2150"/>
       <unit id="org.slf4j.bridge.jul" version="1.7.30.v20200204-2150"/>
-      <unit id="ch.qos.logback.slf4j" version="1.1.2.v20160301-0943"/>
+      <unit id="ch.qos.logback.slf4j" version="1.2.3.v20200428-2012"/>
       <repository location="http://download.eclipse.org/tools/orbit/downloads/latest-R/"/>
     </location>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">