Bump Elasticsearch to v6.4.2

Signed-off-by: Paulo Pires <[email protected]>

Bump Alpine to 3.8.1

Signed-off-by: Paulo Pires <[email protected]>

Bump Elasticsearch to 6.4.0

Fixes pires#64

Signed-off-by: Paulo Pires <[email protected]>

Bump Elasticsearch to v6.3.2

Signed-off-by: Paulo Pires <[email protected]>

Bump Alpine, JRE and Elasticsearch

Signed-off-by: Paulo Pires <[email protected]>

Forcibly disable x-pack ml plug-in

Signed-off-by: Paulo Pires <[email protected]>

Bump Elasticsearch to v6.2.4

Signed-off-by: Paulo Pires <[email protected]>

Bump container image version to 6.2.3_1

Signed-off-by: Paulo Pires <[email protected]>

Bump Elasticsearch to v6.2.3

Signed-off-by: Paulo Pires <[email protected]>

Fix missing path.repo config attribute

Signed-off-by: Paulo Pires <[email protected]>