Fixing OSGi bundle + tycho-p2 build failures (#9017)

* Fixing errors/warnings from maven-bundle-plugin
* avoid issues with eclipse ranges
* Fixing version of p2.core
* revert bach tycho eclipse plugin to last working version 2.7.5

Signed-off-by: Joakim Erdfelt <joakim.erdfelt@gmail.com>
Signed-off-by: Olivier Lamy <olamy@apache.org>
Co-authored-by: Olivier Lamy <olamy@apache.org>

documentation/jetty-asciidoctor-extensions/pom.xml

@@ -11,6 +11,10 @@
   <name>Jetty :: Documentation :: AsciiDoctor Extensions</name>
   <packaging>jar</packaging>
 
+  <properties>
+    <bundle-symbolic-name>${project.groupId}.asciidoctor.extensions</bundle-symbolic-name>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.asciidoctor</groupId>

documentation/jetty-documentation/pom.xml

@@ -11,6 +11,10 @@
   <name>Jetty :: Documentation</name>
   <packaging>jar</packaging>
 
+  <properties>
+    <bundle-symbolic-name>${project.groupId}</bundle-symbolic-name>
+  </properties>
+
   <build>
     <plugins>
       <plugin>

jetty-p2/pom.xml

@@ -12,7 +12,7 @@
   <description>Generates a (maven based) P2 Updatesite</description>
   <packaging>pom</packaging>
   <properties>
-    <tycho-version>3.0.0</tycho-version>
+    <tycho-version>2.7.5</tycho-version>
   </properties>
   <build>
     <plugins>