Checks the signature of Jar
    :param tikaServerJar:
    :param jarPath:
    :return: ``True`` if the signature of the jar matches

def checkJarSig(tikaServerJar, jarPath):
    '''
    Checks the signature of Jar
    :param tikaServerJar:
    :param jarPath:
    :return: ``True`` if the signature of the jar matches
    '''
    if not os.path.isfile(jarPath + ".md5"):
        getRemoteJar(tikaServerJar + ".md5", jarPath + ".md5")
    m = hashlib.md5()
    with open(jarPath, 'rb') as f:
        binContents = f.read()
        m.update(binContents)
        with open(jarPath + ".md5", "r") as em:
            existingContents = em.read()
            return existingContents == m.hexdigest()