UpdateRequestProcessorChain for UIMA : runtimeParameters: not all types supported

solrconfig.xml file has an option to override certain UIMA runtime
parameters in the UpdateRequestProcessorChain section.

There are certain UIMA annotators like RegexAnnotator which define
"runtimeParameters" value as an Array which is not currently supported
in the Solr-UIMA interface.

In java/org/apache/solr/uima/processor/ae/OverridingParamsAEProvider.java,
private Object getRuntimeValue(AnalysisEngineDescription desc, String
attributeName) function defines override for UIMA analysis engine
runtimeParameters as they are passed to UIMA Analysis Engine.
runtimeParameters which are currently supported in the Solr-UIMA interface are:
String
Integer
Boolean
Float

I have made a hack to fix this issue to add Array support. I would
like to submit that as a patch if no one else is working on fixing
this issue.