FTS-1295: apply workaround for pycurl on el7

setup.py

@@ -40,13 +40,25 @@ def apply_pycurl_workaround():
         os.system('pip install --build %s %s/pycurl' % (tmp_dir, tmp_dir))
 
 
+# On EL7, you will probably have trouble installing pycurl due to this:
+# https://github.com/pycurl/pycurl/issues/526 which has not yet released
+# so we need to install a previos version of pycurl with 
+# pip install build/pycurl
+def apply_pycurl_workaround_on_el7():
+    print "Applying workaround for pycurl in EL7"
+    is_pycurl_installed = (os.system('pip list | grep pycurl &> /dev/null') == 0)
+    if not is_pycurl_installed:
+         os.system('pip install pycurl%s --global-option="--with-nss"' % pycurl_ver)
+
+
 # Ugly hack to pick a version that compiles in SLC6
-pycurl_ver = '>= 7.19, <= 7.43.0.1'
 dist = platform.dist()
 if dist[0] in ('redhat', 'centos'):
     apply_m2crypto_workaround()
-
     os_major = dist[1].split('.')[0]
+    if os_major == '7':
+        pycurl_ver = '==7.43.0.1'
+        apply_pycurl_workaround_on_el7()
     if os_major == '6':
         pycurl_ver = '==7.19.0'
         apply_pycurl_workaround()