Increase travis wait time to prevent error (#11470)

* increase travis wait time to prevent error

* reduce travis_wait time to 15 minutes

Author: OlufunkeMoronfolu

.travis.yml

@@ -69,7 +69,7 @@ install:
   # Append output to hugo.log file to print at the end of the travis job
   # (see https://stackoverflow.com/questions/418896/how-to-redirect-output-to-a-file-and-stdout)
 
-  -  ./node_modules/.bin/hugo --environment $TRAVIS_BRANCH 2>&1 | tee -a $TRAVIS_BUILD_DIR/hugo.log
+  - travis_wait 15 bash -c './node_modules/.bin/hugo --environment $TRAVIS_BRANCH 2>&1 | tee -a $TRAVIS_BUILD_DIR/hugo.log'
 
   # normal htmltest takes too much memory - using a modified version which strips <aside> tag content
   # NB - Set pipefail so that Travis CI sees the return code from `tee` and not from `htmltest` so it will always build.