Fix maven-ant-tasks to use HTTPS instead of HTTP

$ ./bootstrap.sh
$ ./configure
$ make
$ cd lib/json
$ make check

(snip)

mvn.init:
[artifact:dependencies] Downloading: com/github/fge/json-schema-validator/2.2.6/json-schema-validator-2.2.6.pom from repository central at http://repo1.maven.org/maven2
[artifact:dependencies] Error transferring file: Server returned HTTP response code: 501 for URL: http://repo1.maven.org/maven2/com/github/fge/json-schema-validator/2.2.6/json-schema-validator-2.2.6.pom
[artifact:dependencies] [WARNING] Unable to get resource 'com.github.fge:json-schema-validator:pom:2.2.6' from repository central (http://repo1.maven.org/maven2): Error transferring file: Server returned HTTP response code: 501 for URL: http://repo1.maven.org/maven2/com/github/fge/json-schema-validator/2.2.6/json-schema-validator-2.2.6.pom
[artifact:dependencies] Downloading: com/github/fge/json-schema-validator/2.2.6/json-schema-validator-2.2.6.jar from repository central at http://repo1.maven.org/maven2
[artifact:dependencies] Error transferring file: Server returned HTTP response code: 501 for URL: http://repo1.maven.org/maven2/com/github/fge/json-schema-validator/2.2.6/json-schema-validator-2.2.6.jar
[artifact:dependencies] [WARNING] Unable to get resource 'com.github.fge:json-schema-validator:jar:2.2.6' from repository central (http://repo1.maven.org/maven2): Error transferring file: Server returned HTTP response code: 501 for URL: http://repo1.maven.org/maven2/com/github/fge/json-schema-validator/2.2.6/json-schema-validator-2.2.6.jar
[artifact:dependencies] An error has occurred while processing the Maven artifact tasks.
[artifact:dependencies]  Diagnosis:
[artifact:dependencies] 
[artifact:dependencies] Unable to resolve artifact: Missing:
[artifact:dependencies] ----------
[artifact:dependencies] 1) com.github.fge:json-schema-validator:jar:2.2.6
[artifact:dependencies] 
[artifact:dependencies]   Try downloading the file manually from the project website.
[artifact:dependencies] 
[artifact:dependencies]   Then, install it using the command: 
[artifact:dependencies]       mvn install:install-file -DgroupId=com.github.fge -DartifactId=json-schema-validator -Dversion=2.2.6 -Dpackaging=jar -Dfile=/path/to/file
[artifact:dependencies] 
[artifact:dependencies]   Alternatively, if you host your own repository you can deploy the file there: 
[artifact:dependencies]       mvn deploy:deploy-file -DgroupId=com.github.fge -DartifactId=json-schema-validator -Dversion=2.2.6 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]
[artifact:dependencies] 
[artifact:dependencies]   Path to dependency: 
[artifact:dependencies]   	1) org.apache.maven:super-pom:pom:2.0
[artifact:dependencies]   	2) com.github.fge:json-schema-validator:jar:2.2.6
[artifact:dependencies] 
[artifact:dependencies] ----------
[artifact:dependencies] 1 required artifact is missing.
[artifact:dependencies] 
[artifact:dependencies] for artifact: 
[artifact:dependencies]   org.apache.maven:super-pom:pom:2.0
[artifact:dependencies] 
[artifact:dependencies] from the specified remote repositories:
[artifact:dependencies]   central (http://repo1.maven.org/maven2)
[artifact:dependencies] 
[artifact:dependencies] 

BUILD FAILED
/home/sekikn/repos/thrift/lib/json/test/build.xml:116: Unable to resolve artifact: Missing:
----------
1) com.github.fge:json-schema-validator:jar:2.2.6

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=com.github.fge -DartifactId=json-schema-validator -Dversion=2.2.6 -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there: 
      mvn deploy:deploy-file -DgroupId=com.github.fge -DartifactId=json-schema-validator -Dversion=2.2.6 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
  	1) org.apache.maven:super-pom:pom:2.0
  	2) com.github.fge:json-schema-validator:jar:2.2.6

----------
1 required artifact is missing.

for artifact: 
  org.apache.maven:super-pom:pom:2.0

from the specified remote repositories:
  central (http://repo1.maven.org/maven2)



Total time: 2 seconds
Makefile:623: recipe for target 'check' failed
make[1]: *** [check] Error 1
make[1]: Leaving directory '/home/sekikn/repos/thrift/lib/json/test'
Makefile:538: recipe for target 'check-recursive' failed
make: *** [check-recursive] Error 1