Fixing errors with new 8.1.x splunk packages

[nwang92]

Some newer Splunk 8.1.x packages are failing to build Docker images due to:

Step 10/43 : RUN tar -C /minimal/splunk --strip 1 --exclude-from=/tmp/splunk-minimal-exclude.list -zxf /tmp/splunk.tgz
 ---> Using cache
 ---> 4d01bbd1b77a
Step 11/43 : RUN tar -C /extras/splunk --strip 1 --wildcards --ignore-command-error --files-from=/tmp/splunk-minimal-exclude.list -zxf /tmp/splunk.tgz
 ---> Running in b8d920876954
tar: */bin/parsetest*: Not found in archive
tar: Exiting with failure status due to previous errors
The command '/bin/sh -c tar -C /extras/splunk --strip 1 --wildcards --files-from=/tmp/splunk-minimal-exclude.list -zxf /tmp/splunk.tgz' returned a non-zero code: 2
make: *** [splunk-debian-10] Error 2

It seems bin/parsetest is completely removed in new packages. Tarring the extras dir with this regex is causing tar to questionably fail. I've tried a combination of --ignore-command-error and --ignore-failed-read but none of those seem to work as how I want :P

[nwang92]

Also this needs to get into master for @scentoni

[nwang92]

@mikedickey I checked the difference between image sizes here building from this branch - nothing too alarming to report other than the actual increase of the Splunk binary.

splunk-debian-10-8.1.0         latest    18ef0eae6ffb        6 minutes ago       1.4GB
splunk-debian-10-7.3.2         latest    6b33bb867e88        9 minutes ago       1.28GB

For reference, using the develop branch for the build gives me the same size (using 7.3.2):

splunk-debian-10               latest    6b33bb867e88        23 minutes ago      1.28GB

I also ran a quick smoke test using an 8.1.0 build and this successfully brought up a standalone:

$ docker run -d -e SPLUNK_START_ARGS=--accept-license -e SPLUNK_PASSWORD=helloworld -P splunk-debian-10-8.1.0