feature: defining of priorityClassName and add ServiceMonitor in helm chart

[acceptMyPR]

This PR makes avaiable defining priorityClassName in daemonSet of kube-fluentd-operator in helm chart.
And it adds ServiceMonitor for supporting of Prometheus Operator

closes #99
closes #100

[acceptMyPR]

/assign @jvassev

[vmwclabot]

@EVILRUSSIAN, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <[email protected]> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit a4348af must be signed by [email protected]

[vmwclabot]

@EVILRUSSIAN, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <[email protected]> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit 7f8cfeb must be signed by [email protected]

[acceptMyPR]

@jvassev ?

[gautam2187]

@EVILRUSSIAN Can you please add the DCO as suggested by the bot.

Thanks!

[acceptMyPR]

@gautam2187
I don't understand what i need to do. This PR has 2 commits and all commits are Signed-off

[gautam2187]

@EVILRUSSIAN should we also check for prometheusEnabled here with serviceMonitor?

[acceptMyPR]

Yes. If prometheusOperator is not installed, then CRD ServiceMonitor will not be defined in cluster, and you will get an error
error: unable to recognize "ServiceMonitor.yaml": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1

[gautam2187]

@EVILRUSSIAN I think the bot is expecting "Signed-off-by: John Doe [email protected]" in the commit message.

[vmwclabot]

@EVILRUSSIAN, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <[email protected]> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit 441d69a must be signed by [email protected]

[vmwclabot]

@EVILRUSSIAN, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <[email protected]> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit 4afa9f4 must be signed by [email protected]

[acceptMyPR]

@gautam2187 all check have passed