Added quotes to allow spaces in installation path

[vidarkongsli]

Closes #8441

[clintongormley]

Hi @vidarkongsli

Thanks for the PR. Please could I ask you to sign the CLA so that we can merge it in?
http://www.elasticsearch.org/contributor-agreement/

@gmarz please could you review this?

[vidarkongsli]

@clintongormley Jumped through the hoop: signed :)

[gmarz]

LGTM. Thanks @vidarkongsli 👍

[s1monw]

@gmarz looks like you can pull this in you got policeman approval on #8441

[uschindler]

LOL

[s1monw]

@uschindler 👍

[gmarz]

Merged. Thanks again @vidarkongsli

[s1monw]

@gmarz can you make sure this issue doesn't exist in our 1.3 branch?

[uschindler]

@s1monw In 1.3.x this worked fine for me in the past, but maybe you have a similar problem in later 1.3 branches.

[gmarz]

@s1monw Confirmed, this is not an issue in 1.3.

[s1monw]

thx @gmarz