Update README.md and changelog.txt to prepare for 5.0.0.Alpha7 release
[maven-release-plugin] prepare release 5.0.0.Alpha7
[maven-release-plugin] prepare for next development iteration
HSEARCH-1596 Removal of method LuceneWorksBuilder.addFieldWithBinaryData
HSEARCH-1596 Improve testing helper ConcurrentRunner to decouple number of loops from number of threads
HSEARCH-1596 Delete unused private helper
HSEARCH-1596 Remove references to deprecated Lucene elements from Serialization helpers
HSEARCH-1683 Bundled JBoss Modules being generated for Apache Lucene uses wrong slot name
HSEARCH-1687 Dependency versions in Arquillian integration tests should not be hardcoded
HSEARCH-1688 Upgrade to Infinispan 7.0.0.CR1
HSEARCH-1688 Remove no longer needed workaround for ISPN-4754
HSEARCH-1621 Update Apache Lucene version to 4.9.0
HSEARCH-1621 Update hibernate-search-engine to the new API of Lucene 4.9
HSEARCH-1680 Upgrade dependencies to Apache Lucene 4.10
HSEARCH-1680 Handling of Version constants changed in Lucene 4.10
HSEARCH-1680 Tests need to be adapted to slightly different behaviour of Analyzers
HSEARCH-1680 Upgrade dependency to Apache Lucene 4.10.1
HSEARCH-1680 Override the Lucene version defined in the Infinispan modules
HSEARCH-1680 Ensure the Search modules overwrite the ones bundled by Infinispan

This is necessary to make sure the Hibernate Search high level slot "5.0" is an alias for the version being built;
otherwise we risk using the alias as being defined by the Infinispan release we happen to depend on.
HSEARCH-1680 Testing helper FileMonitoringDirectory needs to override a new method