relax manifest.mf restrictions on org.eclipse.m2e.tests.common so it can be installed on m2e 1.0 AND 1.1

[ERROR] Cannot resolve project dependencies:
[ERROR]   Software being installed: maven.site raw:1.3.0.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):1.3.0-SNAPSHOT
[ERROR]   Only one of the following can be installed at once: [
  org.eclipse.m2e.maven.runtime 1.0.0.20110607-2117, 
  **org.eclipse.m2e.maven.runtime 1.1.0.20120315-0501,** 
  org.eclipse.m2e.maven.runtime 1.0.100.20110804-1717]

[ERROR]   Cannot satisfy dependency: maven.site raw:1.3.0.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):1.3.0-SNAPSHOT depends on: org.jboss.tools.maven.gwt.feature.feature.group 0.0.0
[ERROR]   Cannot satisfy dependency: maven.site raw:1.3.0.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):1.3.0-SNAPSHOT depends on: org.jboss.tools.maven.test.feature.feature.group 0.0.0
[ERROR]   Cannot satisfy dependency: org.eclipse.m2e.core 1.1.0.20120320-0058 depends on: bundle org.eclipse.m2e.maven.runtime [1.1.0,1.2.0)

**[ERROR]   Cannot satisfy dependency: org.eclipse.m2e.tests.common 1.0.0.20110607-2117 depends on: bundle org.eclipse.m2e.maven.runtime [1.0.0,1.1.0)**
**[ERROR]   Cannot satisfy dependency: org.eclipse.m2e.tests.common 1.0.100.20110804-1717 depends on: bundle org.eclipse.m2e.maven.runtime [1.0.0,1.1.0)**

[ERROR]   Cannot satisfy dependency: org.jboss.tools.maven.gwt 1.3.0.qualifier depends on: bundle org.eclipse.m2e.core [1.0.200,1.2.0)
[ERROR]   Cannot satisfy dependency: org.jboss.tools.maven.gwt.feature.feature.group 1.3.0.qualifier depends on: org.jboss.tools.maven.gwt 0.0.0
[ERROR]   Cannot satisfy dependency: org.jboss.tools.maven.test.feature.feature.group 1.3.0.qualifier depends on: org.jboss.tools.maven.ui.bot.test 0.0.0
[ERROR]   Cannot satisfy dependency: org.jboss.tools.maven.ui.bot.test 1.3.0.qualifier depends on: bundle org.eclipse.m2e.tests.common 0.0.0