Creates a new instance of OsgiManifest. The returned object is preconfigured with:
version: project.version
name: project.archivesBaseName
symbolicName: project.group + "." + project.archivesBaseName (see below for exceptions to this rule)
The symbolic name is usually the group + "." + archivesBaseName, with the following exceptions
if group has only one section (no dots) and archivesBaseName is not null then the
first package name with classes is returned. eg. commons-logging:commons-logging ->
org.apache.commons.logging
if archivesBaseName is equal to last section of group then group is returned. eg.
org.gradle:gradle -> org.gradle
if archivesBaseName starts with last section of group that portion is removed. eg.
org.gradle:gradle-core -> org.gradle.core