RESTXQ renderer fails to extract path parameters in some cases

[apb2006]

Examples:

xqa:extract-restxq /audit/{$ctype=.+}/{$cid=.+}/{$coid=.+} :"ctype=.+}/{$cid=.+}/{$coid=.+"

xqa:extract-restxq /content-chunk-metadata/{$ctype}/{$type}/{$cid}/{$coid}/{$chunkid} :"ctype}/{$type}/{$cid}/{$coid}/{$chunkid"
xqa:extract-restxq /content-chunk-metadata/{$ctype}/{$type}/{$cid}/{$coid}/{$chunkid} :"ctype}/{$type}/{$cid}/{$coid}/{$chunkid"

xqa:extract-restxq /content-metadata/{$ctype}/{$cid}/{$coid} :"ctype}/{$cid}/{$coid"
xqa:extract-restxq /content-metadata/{$ctype}/{$cid}/{$coid} :"ctype}/{$cid}/{$coid"

xqa:extract-restxq /content/{$ct=.+}/{$cid=.+}/{$coid=.+}/taxonomies :"ct=.+}/{$cid=.+}/{$coid=.+"
xqa:extract-restxq /content/{$ct=.+}/{$cid=.+}/{$coid=.+}/versions :"ct=.+}/{$cid=.+}/{$coid=.+"
xqa:extract-restxq /contenttypefacet/{$taxonomyid=.+} :"taxonomyid=.+"