Upgrade build tools.

This complements the corresponding change in the aurora repo:
  https://reviews.apache.org/r/45661/

Reviewed at https://reviews.apache.org/r/45662/
diff --git a/builder/deb/debian-jessie/Dockerfile b/builder/deb/debian-jessie/Dockerfile
index 63e89de..fd15dfe 100644
--- a/builder/deb/debian-jessie/Dockerfile
+++ b/builder/deb/debian-jessie/Dockerfile
@@ -40,8 +40,8 @@
 RUN git clone --depth 1 https://github.com/benley/gradle-packaging \
   && cd gradle-packaging \
   && apt-get install -y ruby ruby-dev unzip wget \
-  && gem install fpm && ./gradle-mkdeb.sh 2.10 \
-  && dpkg -i gradle-2.10_2.10-2_all.deb \
+  && gem install fpm && ./gradle-mkdeb.sh 2.12 \
+  && dpkg -i gradle-2.12_2.12-2_all.deb \
   && cd .. && rm -rf gradle-packaging
 
 ADD build.sh /build.sh
diff --git a/builder/deb/debian-jessie/pants.ini b/builder/deb/debian-jessie/pants.ini
index 2ff2d5e..446ea8d 100644
--- a/builder/deb/debian-jessie/pants.ini
+++ b/builder/deb/debian-jessie/pants.ini
@@ -1,4 +1,4 @@
-[DEFAULT]
+[GLOBAL]
 print_exception_stacktrace: True
 
 [python-repos]
diff --git a/builder/deb/ubuntu-trusty/Dockerfile b/builder/deb/ubuntu-trusty/Dockerfile
index 5273910..a4a9e64 100644
--- a/builder/deb/ubuntu-trusty/Dockerfile
+++ b/builder/deb/ubuntu-trusty/Dockerfile
@@ -44,8 +44,8 @@
 RUN git clone --depth 1 https://github.com/benley/gradle-packaging \
   && cd gradle-packaging \
   && apt-get install -y ruby ruby-dev unzip wget \
-  && gem install fpm && ./gradle-mkdeb.sh 2.10 \
-  && dpkg -i gradle-2.10_2.10-2_all.deb \
+  && gem install fpm && ./gradle-mkdeb.sh 2.12 \
+  && dpkg -i gradle-2.12_2.12-2_all.deb \
   && cd .. && rm -rf gradle-packaging
 
 ADD build.sh /build.sh
diff --git a/builder/deb/ubuntu-trusty/pants.ini b/builder/deb/ubuntu-trusty/pants.ini
index 2ff2d5e..446ea8d 100644
--- a/builder/deb/ubuntu-trusty/pants.ini
+++ b/builder/deb/ubuntu-trusty/pants.ini
@@ -1,4 +1,4 @@
-[DEFAULT]
+[GLOBAL]
 print_exception_stacktrace: True
 
 [python-repos]
diff --git a/builder/rpm/centos-7/pants.ini b/builder/rpm/centos-7/pants.ini
index 0d7ec6b..3c994e8 100644
--- a/builder/rpm/centos-7/pants.ini
+++ b/builder/rpm/centos-7/pants.ini
@@ -1,4 +1,4 @@
-[DEFAULT]
+[GLOBAL]
 print_exception_stacktrace: True
 
 [python-repos]
diff --git a/specs/debian/control b/specs/debian/control
index a30e987..9dd927d 100644
--- a/specs/debian/control
+++ b/specs/debian/control
@@ -3,7 +3,7 @@
 Maintainer: The Apache Aurora authors <dev@aurora.apache.org>
 Build-Depends: debhelper (>= 9),
  java8-sdk | openjdk-8-jdk,
- gradle (>= 2.10) | gradle-2.10,
+ gradle (>= 2.12) | gradle-2.12,
  python-all-dev,
  libkrb5-dev,
  curl,
diff --git a/specs/rpm/aurora.spec b/specs/rpm/aurora.spec
index 61e7d14..879c93a 100644
--- a/specs/rpm/aurora.spec
+++ b/specs/rpm/aurora.spec
@@ -30,7 +30,7 @@
 %endif
 
 %if %{?!GRADLE_VERSION:1}0
-%global GRADLE_VERSION 2.10
+%global GRADLE_VERSION 2.12
 %endif
 
 %if %{?!JAVA_VERSION:!}0