Fix : Issue with getting slide title using apache POI

Indexing office files is one of the common case while developing search applications. In my case I needed to index slides of a presentation in which title and content needs to indexed separately as we need to provide high boosting for title. But while extracting title for slides using XSLFSlide objects method getTitle(). Title is not getting returned for many slides.

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Solr : Same configuration files for master/slave for every environment

A solr core needs so many configuration files. They look different for master and slave. Also some files like data-config.xml are different for environments when you have data sources to index from. With these permutations, you might end up with large sets of config files. Here I have explained how I managed maintain only single set for all servers and all environments.
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