Revert ".travis.yml: don't do deploy on pull requests to the prod branch."

This reverts commit dec9662.

It turned out that this makes config invalid and build fails with
"did not find expected key while parsing a block mapping at line 43 column 5" error.

Author: php-coder

.travis.yml

@@ -12,7 +12,7 @@ before_script:
   - if [ "$SPRING_PROFILES_ACTIVE" = 'travis' ]; then
       mysql -u travis -e 'CREATE DATABASE mystamps CHARACTER SET utf8;';
       mkdir -p /tmp/uploads /tmp/preview;
-      if [ "$TRAVIS_BRANCH" = 'prod' -a "$TRAVIS_PULL_REQUEST" = 'false' ]; then
+      if [ "$TRAVIS_BRANCH" = 'prod' ]; then
         pip install --user ansible==2.1.1.0;
       fi;
       npm install -g bootlint;
@@ -41,7 +41,7 @@ deploy:
   script: ./src/main/scripts/ci/deploy.sh
   on:
     branch: prod
-    condition: "$SPRING_PROFILES_ACTIVE" = 'travis' -a "$TRAVIS_PULL_REQUEST" = 'false'
+    condition: $SPRING_PROFILES_ACTIVE = 'travis'
   skip_cleanup: true
 
 jdk: