Fix FELIX-2705 Provide a way to extend the logger strategy
Define a new ErrorHandler service interface. The iPOJO logger invokes this services when a warning or an error is thrown.

Also generalize the usage of the logger

Add tests about FELIX-2705 and re-enable logger tests.

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1037859 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/ipojo/tests/core/logger/erroneous-component.xml b/ipojo/tests/core/logger/erroneous-component.xml
new file mode 100644
index 0000000..9ac7735
--- /dev/null
+++ b/ipojo/tests/core/logger/erroneous-component.xml
@@ -0,0 +1,5 @@
+<ipojo>
+<component immediate="true" classname="org.apache.felix.ipojo.tests.core.component.MyErroneousComponent">
+  <provides/>
+</component>
+</ipojo>