adjust how xsl file is loaded
update import pages so it can add by collection similar to import covers script
fix ocr indexing issue (xslt result not json-serializable)
update abbyocr to text xslt with  simple table layout support

[#77314894]
update ocr to text xsl to also work with abbyy v6 ns

[#77314894]
unit test for fulltext generated from ocr/xsl

[#77314894]
unit test cleanup

change to collection html title; addition of random covers to collection browse
correct misplaced endif hiding page search results in some cases
unit test for solr highlight displayed on volume search